Phased array detection method for transverse cracks of internal thread spiral water cooling wall and electronic equipment

Abstract

The invention provides an internal thread spiral water-cooled wall transverse crack phased array detection method and electronic equipment, and belongs to the technical field of high-parameter thermal power generating unit boiler water-cooled wall inner wall crack nondestructive detection.The method comprises the steps that a water-cooled wall three-dimensional image data model is established according to the specification and size of a to-be-detected water-cooled wall; based on the image data model, carrying out analog simulation on the transverse crack of the water-cooled wall to be detected; a simulation process is adopted, a special-shaped wedge block is adopted to test the reference block based on the simulated transverse crack, and a test result is obtained; the reference block and the to-be-detected water-cooled wall are made of the same material and have the same specification; adjusting focusing rule parameters according to a test result, and determining a real-time scanning imaging display form; scanning the water-cooled wall to be detected along the axial direction with the adjusted detection sensitivity, and determining a transverse crack phased array detection result of the water-cooled wall based on an image corresponding to a real-time scanning imaging display form. According to the scheme, the accuracy of transverse crack detection of the internal thread spiral water cooling wall can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of non-destructive testing for cracks on the inner wall of the boiler water wall of high-parameter thermal power units, and particularly relates to a phased array detection method and an electronic device for transverse cracks of an internally threaded spiral water wall. Background Art

[0002] Power stations frequently adjust the start-stop and load changes of boilers according to the power consumption requirements of power grid companies, causing the furnace wall water wall to repeatedly bend and deform under hot and cold conditions, resulting in the water wall bearing large alternating thermal stresses, and thus generating low-cycle alternating fatigue transverse cracks at the internal thread steps. The cracks expand from the inside out along the spiral direction of the internal thread. When the cracks expand to the yield strength of the water wall material and the limit of internal pressure resistance, the water wall tube will fatigue crack, leading to the non-stop operation of the boiler unit due to tube explosion.

[0003] For the thermal fatigue transverse cracks that expand from the inside out along the spiral direction at the thread steps of the internally threaded spiral water wall tubes of boilers, the existing non-destructive testing methods are radiographic testing and ultrasonic testing. However, the detection accuracy of these two methods in the prior art is relatively low. Therefore, how to improve the detection accuracy of transverse cracks in the internally threaded spiral water wall has become a problem to be solved. Summary of the Invention

[0004] The purpose of the present application is to provide a phased array detection method for transverse cracks of an internally threaded spiral water wall, which can solve the problem of relatively low detection accuracy of transverse cracks in the internally threaded spiral water wall in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a phased array detection method for transverse cracks of an internally threaded spiral water wall, and the method includes:

[0006] Establish a three-dimensional image data model of the water wall according to the specification dimensions of the water wall to be detected;

[0007] Based on the image data model, perform simulation on the transverse cracks of the water wall to be detected;

[0008] Adopt a simulation process, and use a special-shaped wedge block to test a comparison test block based on the simulated transverse cracks to obtain a test result; the comparison test block and the water wall to be detected are of the same material and specification;

[0009] Adjust the focusing rule parameters according to the test result, and determine the real-time scanning imaging display form;

[0010] Scan the water wall to be detected axially with the adjusted detection sensitivity, and determine the phased array detection result of the transverse cracks of the water wall based on the image corresponding to the real-time scanning imaging display form.

[0011] In a possible implementation of the first aspect, the specification dimensions of the water-cooled wall to be detected include: material, diameter, wall thickness, spiral climbing angle, thread thickness, thread width, and thread pitch.

[0012] In a possible implementation of the first aspect, based on the image data model, a simulation of the transverse crack of the water-cooled wall to be detected is carried out, including:

[0013] Preset a transverse crack at the position of the internal thread spiral step in the image data model, and simulate the preset transverse crack based on the simulation parameters.

[0014] In a possible implementation of the first aspect, the parameters of the preset transverse crack include: crack length, width, height, and extension direction; the simulation parameters include: focusing law parameters and imaging display forms.

[0015] The focusing law parameters include: excitation aperture, deflection angle, step angle, and focusing method; the imaging display forms include: A-scan display, C-scan display, and sector scan display; the parameters of the special-shaped wedge block include: model, material, refraction angle, rotation angle, and radian;

[0016] The reference block includes a specific reflector. The specific reflector is a notch reflector with a preset depth, preset length along the internal thread direction at the thread root, and at a preset angle with the axis of the reference block. The notch reflector is one or more, and the notch reflector represents a transverse crack; the parameters of the reference block include: the specification and material of the reference block, and the length, depth, height, and extension direction of the notch reflector.

[0017] In a possible implementation of the first aspect, using the simulation process, based on the simulated transverse crack, a special-shaped wedge block is used to test the reference block to obtain test results, including:

[0018] The special-shaped wedge block is used to scan along the axis of the reference block to obtain an alternative transverse crack; the alternative transverse crack is compared with the simulated transverse crack to obtain a comparison result; among them, when scanning, the incident sound beam is perpendicular to the notch reflector along the spiral direction.

[0019] In a possible implementation of the first aspect, the method further includes:

[0020] Based on the encoder, record the scanning path for scanning the water-cooled wall to be detected.

[0021] In a possible implementation of the first aspect, the method further includes:

[0022] Perform axial scanning along the reference block, adjust the echo amplitude of a specific reflector to reach the preset value of the full-screen echo amplitude of the imaging display image; use the adjusted preset value of the echo amplitude gain as the standard detection sensitivity; based on the standard detection sensitivity, compensate the detection sensitivities corresponding to different positions of the reference block to the standard detection sensitivity, and draw a sensitivity curve based on the distance, amplitude, and standard detection sensitivity;

[0023] Among them, the sensitivity curve indicates that the detection sensitivities corresponding to different positions are all the standard detection sensitivity.

[0024] In a possible implementation manner of the first aspect, the phased array detection results include: the position, size, and shape of the transverse crack; perform axial scanning on the water-cooled wall to be detected with the adjusted detection sensitivity, and based on the image corresponding to the real-time scanning imaging display form, determine the phased array detection results of the transverse crack of the water-cooled wall, including:

[0025] Perform axial scanning on the water-cooled wall to be detected with the standard detection sensitivity to obtain the echo signals of the internal thread structure and the transverse crack echo signals; based on the echo signals of the internal thread structure and the transverse crack echo signals, determine the image corresponding to the real-time scanning imaging display form;

[0026] Based on the image corresponding to the real-time scanning imaging display form, distinguish the echo signals of the internal thread structure and the transverse crack echo signals; eliminate the echo signals of the internal thread structure, and based on the transverse crack echo signals, determine the position, size, and shape of the transverse crack of the water-cooled wall.

[0027] In the second aspect, an embodiment of the present application provides a phased array detection device for transverse cracks of an internally threaded spiral water-cooled wall, and the device includes:

[0028] A building unit, configured to build a three-dimensional image data model of the water-cooled wall according to the specification size of the water-cooled wall to be detected;

[0029] A simulation unit, configured to perform simulation on the transverse crack of the water-cooled wall to be detected based on the image data model;

[0030] A testing unit, configured to use a simulation process, and test a reference block with a special-shaped wedge block based on the simulated transverse crack to obtain a test result; the reference block and the water-cooled wall to be detected are of the same material and specification;

[0031] A determination unit, configured to adjust the focusing rule parameters according to the test result and determine the real-time scanning imaging display form;

[0032] A processing unit, configured to perform axial scanning on the water-cooled wall to be detected with the adjusted detection sensitivity, and based on the image corresponding to the real-time scanning imaging display form, determine the phased array detection results of the transverse crack of the water-cooled wall.

[0033] In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the phased array detection method for transverse cracks of the internally threaded spiral water wall described in any one of the above first aspects is implemented.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the phased array detection method for transverse cracks of the internally threaded spiral water wall described in any one of the above first aspects is implemented.

[0035] In a fifth aspect, an embodiment of the present application provides a computer program product, and when the computer program product runs on an electronic device, the electronic device is enabled to execute the phased array detection method for transverse cracks of the internally threaded spiral water wall described in any one of the above first aspects.

[0036] The solution of the present application establishes a three-dimensional image data model of the water wall according to the specification size of the water wall to be detected; based on the image data model, simulates and emulates the transverse cracks of the water wall to be detected; adopts a simulation process, and uses a special-shaped wedge block to test a comparison block based on the simulated and emulated transverse cracks to obtain a test result; the comparison block and the water wall to be detected are of the same material and specification; adjusts the focusing rule parameters according to the test result, and determines the real-time scanning imaging display form; scans the water wall to be detected axially with the adjusted detection sensitivity, and determines the phased array detection result of the transverse cracks of the water wall based on the image corresponding to the real-time scanning imaging display form.

[0037] The solution of the present application uses phased array detection to detect the transverse cracks of the internally threaded spiral water wall, which can improve the accuracy of detecting the transverse cracks of the internally threaded spiral water wall and has strong usability and practicability.

[0038] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 is a schematic diagram of the application scenario of the phased array detection method for transverse cracks of the internally threaded spiral water wall provided by the embodiment of the present application;

[0041] Figure 2It is a schematic diagram of the steps of the phased array detection method for transverse cracks of the internal-thread spiral water-cooled wall provided by an embodiment of the present application;

[0042] Figure 3 It is a schematic diagram of the structure of the three-dimensional image data model of the water-cooled wall provided by an embodiment of the present application;

[0043] Figure 4 It is a schematic diagram of the fan-shaped scan display provided by an embodiment of the present application;

[0044] Figure 5 It is a schematic diagram of the structure of the phased array detection device for transverse cracks of the internal-thread spiral water-cooled wall provided by an embodiment of the present application;

[0045] Figure 6 It is a schematic diagram of the structure of the electronic device provided by an embodiment of the present application. Detailed implementation manners

[0046] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0047] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or photovoltaic modules, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, photovoltaic modules, and / or their combinations.

[0048] It should also be understood that the terms used in this specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification of the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0049] It should be further understood that the term " / and" as used in this specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0050] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0051] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0053] As an important heat transfer component of thermal power units, water-cooled walls have extremely harsh working environments and are subjected to extreme conditions such as high temperature, high pressure, corrosion, and wear. With the commissioning of ultra-supercritical units with high parameters and large capacity, the operating conditions of water-cooled walls are even more demanding. The water-cooled walls absorb the radiation heat of high-temperature flames and flue gases in the furnace, generate steam or hot water in the tubes, and reduce the temperature of the furnace wall. In order to prevent the deterioration of heat transfer, Cr-Mo (chromium-molybdenum) alloy steel spiral internal threaded pipes with smaller diameters are often used.

[0054] The power station frequently adjusts the start and stop of the boiler and the load changes according to the power demand of the power grid company, causing the water-cooled wall of the furnace wall to bend and deform repeatedly under hot and cold conditions, causing the water-cooled wall to bear large alternating thermal stress, thereby generating low-cycle alternating fatigue transverse cracks at the internal thread step. The cracks extend from the inside to the outside along the spiral direction of the internal thread. When the cracks extend to the yield strength of the water-cooled wall material and the internal pressure limit, fatigue cracking of the water-cooled wall tube will cause the unit to burst and stop.

[0055] For the thermal fatigue transverse cracks that expand from the inside to the outside along the spiral direction at the thread steps of the internal thread spiral water wall tubes in the boiler, the existing non-destructive testing methods include radiographic testing and ultrasonic testing. Due to the internal threads, the water wall has two thicknesses arranged alternately at intervals. Radiographic testing is sensitive to the thickness difference, resulting in poor clarity of the photographic film, blurred images, and it is difficult to detect the tiny cracks at the thread roots. Moreover, radiographic testing requires arranging the film and the X-ray machine both inside and outside the furnace simultaneously, with high operation difficulty and cost.

[0056] When using type A pulsed ultrasonic testing, the initial pulse width of the single crystal probe is relatively large, the tube wall is thin, and the reflected echo signal is confused with the initial pulse echo and difficult to distinguish. Moreover, when performing type A pulsed ultrasonic testing, the probe scans along the axial direction of the water wall tube, and the incident sound beam forms a large angle with the transverse cracks along the spiral direction on the inner wall of the water wall. The reflected sound beam cannot return along the original path, and the ultrasonic equipment cannot receive the crack reflected echo, resulting in the failure of the detection.

[0057] The detection accuracy of these two methods in the prior art is relatively low. Therefore, how to improve the detection accuracy of the transverse cracks of the internal thread spiral water wall has become a problem to be solved.

[0058] In view of the above defects, the embodiment of the present application provides a phased array detection method for transverse cracks of internal thread spiral water walls. According to the specification dimensions of the water wall to be detected, a three-dimensional image data model of the water wall is established; based on the image data model, the transverse cracks of the water wall to be detected are simulated; using the simulation process, based on the simulated transverse cracks, a special-shaped wedge block test comparison block is used to obtain the test results; the comparison block and the water wall to be detected are of the same material and specification; according to the test results, the focusing rule parameters are adjusted to determine the real-time scanning imaging display form; the water wall to be detected is scanned along the axial direction with the adjusted detection sensitivity, and based on the image corresponding to the real-time scanning imaging display form, the phased array detection results of the transverse cracks of the water wall are determined.

[0059] The solution of the present application uses phased array detection to detect the transverse cracks of the internal thread spiral water wall, which can improve the detection accuracy of the transverse cracks of the internal thread spiral water wall and has strong usability and practicality.

[0060] The following introduces the specific process implemented by the present application through specific embodiments.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the application scenario of the phased array detection method for transverse cracks of internal thread spiral water walls provided by the embodiment of the present application. As Figure 1 shown, there are 2 transverse cracks on the internal thread spiral water wall. The phased array detection method for transverse cracks of internal thread spiral water walls provided by the embodiment of the present application can accurately detect these 2 transverse cracks.

[0062] Based on the above application scenarios, an embodiment of the present application provides a phased array detection method for transverse cracks in an internal-threaded spiral water wall. The specific process implemented by this method will be introduced through specific embodiments below.

[0063] Please refer to Figure 2 , Figure 2 which is a schematic diagram of the steps of the phased array detection method for transverse cracks in the internal-threaded spiral water wall provided by an embodiment of the present application. As Figure 2 shown, the method may include the following steps:

[0064] S201. Establish a three-dimensional image data model of the water wall according to the specification dimensions of the water wall to be detected.

[0065] In some embodiments, according to the specific specification dimensions of the water wall to be detected, a three-dimensional image data model of the internal-threaded spiral water wall is established in solidword (solid modeling) software. The structural schematic diagram of the three-dimensional image data model of the water wall is as Figure 3 shown.

[0066] According to an implementation manner of the present application, the specification dimensions of the water wall to be detected include: material, diameter, wall thickness, spiral climbing angle, thread thickness, thread width, and thread pitch.

[0067] In one embodiment, the material of the water wall to be detected is SA-213T12, the diameter is 32 mm, the wall thickness is 5.5 mm, the spiral climbing angle is 45°, the thread thickness is 1 mm, the width is 4.2 mm, and the pitch is 7 mm.

[0068] S202. Based on the image data model, perform simulation on the transverse cracks of the water wall to be detected.

[0069] According to an implementation manner of the present application, performing simulation on the transverse cracks of the water wall to be detected based on the image data model includes:

[0070] Preset transverse cracks at the internal-threaded spiral step positions in the image data model, and perform simulation on the preset transverse cracks based on the simulation parameters.

[0071] In some embodiments, the three-dimensional image data model of the water wall is imported into CIVA simulation software, and transverse cracks are preset at the internal-threaded spiral step positions. A 7.5 MHz phased array linear array probe is selected, and a special-shaped wedge is matched. The arc of the wedge coincides with the outer wall of the water wall. The rotation angle of the wedge is repeatedly adjusted so that the incident sound beam rotates a certain angle until the incident sound beam is perpendicular to the transverse crack along the internal-threaded spiral direction when the probe scans along the axial direction of the water wall. Set the simulation parameters to perform simulation on the transverse cracks of the spiral internal threads of the water wall.

[0072] According to an embodiment of the present application, the parameters of the preset transverse crack include: crack length, width, height, and extension direction. The simulation parameters include: focusing law parameters and imaging display form. The probe parameters include: model, frequency, number of wafers, wafer spacing, and wafer arrangement. Among them, the focusing law parameters include: excitation aperture, deflection angle, step angle, and focusing method.

[0073] S203. Adopt the simulation process, and use a special-shaped wedge to test the comparison test block based on the simulated transverse crack to obtain the test results. The comparison test block and the water-cooled wall to be detected are of the same material and specification.

[0074] According to an embodiment of the present application, the parameters of the special-shaped wedge include: model, material, refraction angle, rotation angle, and radian. The structural schematic diagram of the special-shaped wedge is as Figure 4 shown.

[0075] In some embodiments, the special-shaped wedge is processed according to the parameters (simulation data) of the special-shaped wedge in the simulation test. For example, the radian R of the wedge is 16 mm, the torsion angle of the wedge is 45°, and the refraction angle of the wedge is 36°. When the phased array device scans along the axial direction of the water-cooled wall based on the special-shaped wedge, it fits well with the outer diameter Φ32 mm of the water-cooled wall, and the coupling is good. The incident sound velocity is perpendicular to the transverse crack in the inner-thread spiral direction at an angle of 45° to the axial direction of the water-cooled wall, and the crack reflection signal returns to the phased array device along the original path of the incident sound beam.

[0076] In some embodiments, the phased array device is adjusted according to the simulation process, and the processed special-shaped wedge is used. The rotation angle in the special-shaped wedge is used to make the incident sound beam perpendicular to the cut groove along the inner-thread direction, so that the reflected sound beam signal returns to the phased array device along the original path.

[0077] According to an embodiment of the present application, the comparison test block includes a specific reflector. The specific reflector is a cut-groove reflector with a preset depth, preset length, and a preset angle to the axial direction of the comparison test block along the inner-thread direction at the root of the thread. The cut-groove reflector is one or more, and the cut-groove reflector represents a transverse crack. The parameters of the comparison test block include: the specification and material of the comparison test block, and the length, depth, height, and extension direction of the cut-groove reflector.

[0078] In some embodiments, an inner-thread spiral water-cooled wall of the same material and specification is selected, and a cut groove with a depth of 1.0 mm, a length of 10 mm, and an angle of 45° to the axial direction of the water-cooled wall is processed along the inner-thread direction at the root of the thread. The cut groove is representative of the transverse crack.

[0079] In some embodiments, a comparison test block containing a specific reflector that can represent crack defects is processed according to the requirements of the metal standard of thermal power units. The comparison test block has a cut groove along the inner-thread spiral direction for verifying the simulation process and adjusting the sensitivity.

[0080] According to an embodiment of the present application, a simulation process is adopted. Based on the simulated transverse crack, a special-shaped wedge block is used to test the reference block, and test results are obtained, including:

[0081] The special-shaped wedge block is used to scan axially along the reference block to obtain an alternative transverse crack. The alternative transverse crack is compared with the simulated transverse crack to obtain a comparison result. Among them, when scanning, the incident sound beam is perpendicular to the groove reflector along the spiral direction.

[0082] In some embodiments, a simulation process is adopted. The phased array device scans axially along the reference block based on the phased array linear array probe equipped with a special-shaped wedge block to obtain an alternative transverse crack, that is, a groove. At this time, the incident sound beam is perpendicular to the groove along the spiral direction in the reference block. The alternative transverse crack is compared with the simulated transverse crack to determine whether they are consistent. If they are consistent, it indicates that the processed reference block is good; if they are inconsistent, it indicates that the processed reference block is poor and needs to be processed again.

[0083] S204. Adjust the focusing rule parameters according to the test results and determine the real-time scanning imaging display form.

[0084] According to an embodiment of the present application, the imaging display forms include: A-scan display, C-scan display, and sector scan display. In some embodiments, the phased array device adjusts the focusing rule parameters such as excitation aperture, deflection angle, step angle, and focusing mode according to the test results, and determines which one or more of the A-scan display, C-scan display, and sector scan display the real-time scanning imaging display form is. The sector scan display is as Figure 4 shown.

[0085] According to an embodiment of the present application, the method further includes: recording the scanning path of the water-cooled wall to be detected based on an encoder.

[0086] S205. Scan the water-cooled wall to be detected axially with the adjusted detection sensitivity, and determine the phased array detection result of the transverse crack of the water-cooled wall based on the image corresponding to the real-time scanning imaging display form.

[0087] According to an embodiment of the present application, the method further includes:

[0088] Scan axially along the reference block, adjust the echo amplitude of a specific reflector to reach the preset value of the full-screen wave amplitude of the imaging display image. Take the adjusted echo amplitude gain preset value as the standard detection sensitivity; based on the standard detection sensitivity, compensate the detection sensitivities corresponding to different positions of the reference block to the standard detection sensitivity, and draw a sensitivity curve based on the distance, wave amplitude, and standard detection sensitivity.

[0089] Among them, the sensitivity curve indicates that the detection sensitivities corresponding to different positions are all standard detection sensitivities.

[0090] In some embodiments, the phased array device adjusts the echo amplitude of the reflector to reach 80% of the full screen amplitude based on the axial scan of the probe along the reference block, and then gains 6 dB as the scan sensitivity, and makes a sensitivity curve, so that the same-sized reference blocks have the same sensitivity at different positions, which is convenient for determining the size of the transverse crack at the internal thread step of the water wall.

[0091] Exemplarily, the echo amplitude of the reflector reaches 8 dB, and then gains 6 dB (reaching 14 dB) as the scan sensitivity (when the phased array device scans the reference block based on the probe, the echo amplitudes at different depths should all reach 14 dB), and makes a sensitivity curve, so that the same-sized reference blocks have the same sensitivity at different positions. For example, when the distances from the left side on the same-sized reference blocks are 5, 6, 7, and 8 mm respectively, the echo amplitudes should all reach 14 dB.

[0092] According to an embodiment of the present application, the sensitivity curve is drawn based on distance, amplitude, and standard detection sensitivity, including:

[0093] Taking the distance as the horizontal axis and the amplitude as the vertical axis, connecting the discrete points formed by different depths and the standard detection sensitivity into a curve, and this curve is the sensitivity curve.

[0094] According to an embodiment of the present application, the phased array detection results include: the position, size, and shape of the transverse crack. Scanning the water wall to be detected along the axial direction with the adjusted detection sensitivity, and based on the image corresponding to the real-time scanning imaging display form, determining the phased array detection results of the transverse crack of the water wall, including:

[0095] Scanning the water wall to be detected along the axial direction with the standard detection sensitivity to obtain the echo signals of the internal thread structure and the echo signals of the transverse crack. Based on the echo signals of the internal thread structure and the echo signals of the transverse crack, determining the image corresponding to the real-time scanning imaging display form.

[0096] Based on the image corresponding to the real-time scanning imaging display form, differentiating the echo signals of the internal thread structure and the echo signals of the transverse crack. Eliminating the echo signals of the internal thread structure, and determining the position, size, and shape of the transverse crack of the water wall based on the echo signals of the transverse crack.

[0097] In some embodiments, the signals received by the phased array device include the echo signals of the internal thread structure and the echo signals of the transverse crack. By differentiating the signals in the real-time imaging diagram, eliminating the echo signals of the internal thread structure, and analyzing and positioning the echo signals of the transverse crack to determine the position, size, and shape of the transverse crack of the water wall.

[0098] The phased array detection method for transverse cracks of the internal-thread spiral water wall provided by the embodiment of the present application establishes a three-dimensional image data model of the water wall according to the specification size of the water wall to be detected; based on the image data model, simulates and emulates the transverse cracks of the water wall to be detected; adopts a simulation process, and uses a special-shaped wedge block to test a comparison test block based on the simulated and emulated transverse cracks to obtain a test result; the comparison test block and the water wall to be detected are of the same material and specification; adjusts the focusing law parameters according to the test result, and determines the real-time scanning imaging display form; scans the water wall to be detected axially with the adjusted detection sensitivity, and determines the phased array detection result of the transverse cracks of the water wall based on the image corresponding to the real-time scanning imaging display form.

[0099] The solution of the present application uses phased array detection to detect the transverse cracks of the internal-thread spiral water wall, which can improve the accuracy of detecting the transverse cracks of the internal-thread spiral water wall, and has strong usability and practicability.

[0100] The solution of the present application adopts phased array technology and processes a special-shaped wedge block, so that when the probe scans axially along the water wall tube, the incident sound beam twists by a certain angle to be perpendicular to the crack along the spiral direction at the position of the internal-thread step of the water wall, and the crack reflected sound beam signal returns to the phased array device along the original path of the incident sound beam. In addition, there are various real-time imaging displays, the display is more intuitive, the positioning is more accurate, and it is convenient to identify and analyze whether it is a crack echo or an internal-thread step structure echo.

[0101] The solution of the present application establishes a three-dimensional image data model of the internal-thread spiral water wall, simulates and emulates the transverse cracks, processes a special-shaped wedge block according to the simulation result, changes the incident direction of the sound beam to make the sound beam perpendicular to the crack extending along the internal thread, and makes the crack reflected sound beam signal return to the phased array device along the original path of the incident sound beam. It solves the problem that when using A-type pulse ultrasonic detection, the incident sound beam forms a large angle with the crack and the crack echo cannot be received.

[0102] In addition, process a comparison test block, detect the cut groove of the comparison test block, adjust the focusing law parameters of the equipment, select real-time imaging displays in different orientations, add an encoder to record the scanning path, utilize the high resolution of the phased array to distinguish the internal-thread structure wave and the transverse crack echo, and locate the crack, so as to be able to detect the transverse cracks of the internal thread of the water wall in time and deal with them in time, ensuring the safe operation of the unit and avoiding non-stop accidents.

[0103] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0104] Corresponding to the method in the above embodiment, Figure 5It is a schematic structural diagram of the phased array detection device for transverse cracks of the internal-thread spiral water-cooled wall provided by an embodiment of the present application. For the convenience of description, only parts related to the embodiment of the present application are shown.

[0105] Referring to Figure 5 , the device includes:

[0106] A building unit 501, configured to build a three-dimensional image data model of the water-cooled wall according to the specification dimensions of the water-cooled wall to be detected;

[0107] A simulation unit 502, configured to simulate and imitate the transverse cracks of the water-cooled wall to be detected based on the image data model;

[0108] A testing unit 503, configured to adopt a simulation process, and use a special-shaped wedge block to test a comparison test block based on the simulated and imitated transverse cracks to obtain a test result; the comparison test block and the water-cooled wall to be detected are of the same material and specification;

[0109] A determination unit 504, configured to adjust the focusing rule parameters according to the test result and determine the real-time scanning imaging display form;

[0110] A processing unit 505, configured to scan the water-cooled wall to be detected axially with the adjusted detection sensitivity, and determine the phased array detection result of the transverse cracks of the water-cooled wall based on the image corresponding to the real-time scanning imaging display form.

[0111] It should be noted that for the content such as information interaction and execution process among the above-mentioned device / units, since it is based on the same concept as the method embodiment of the present application, for its specific functions and the technical effects brought, reference can be specifically made to the method embodiment part, and details are not described here again.

[0112] Those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above-mentioned division of each functional unit and module block is used as an example for illustration. In actual application, the above-mentioned functions can be allocated to different functional units and module blocks according to needs, that is, the internal structure of the device is divided into different functional units or module blocks to complete all or part of the functions described above. Each functional unit and module block in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of each functional unit and module block are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working processes of the units and module blocks in the above-mentioned system can refer to the corresponding processes in the foregoing method embodiment, and details are not described here again.

[0113] Figure 6It is a schematic structural diagram of the electronic device 6 provided by an embodiment of the present application. As Figure 6 shown, the electronic device 6 of this embodiment includes: at least one processor 601 ( Figure 6 only one is shown in the figure), a memory 603, and a computer program 602 stored in the memory 603 and executable on at least one processor 601. When the processor 601 executes the computer program 602, the steps in the above method embodiment are implemented.

[0114] The electronic device 6 may be a phased array device, and the phased array device is connected to a phased array linear array probe. The electronic device 6 may include, but is not limited to, a processor 601 and a memory 603. Those skilled in the art can understand that Figure 6 this is only an example of the electronic device 6 and does not constitute a limitation on the electronic device 6. It may include more or fewer components than shown in the figure, or combine some components, or different components. For example, it may also include input and output devices, network access devices, etc.

[0115] The so-called processor 601 may be a central processing unit (CPU), and the processor 601 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware photovoltaic components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0116] In some embodiments, the memory 603 may be an internal storage unit of the electronic device 6, such as the hard disk or memory of the electronic device 6. In other embodiments, the memory 603 may also be an external storage device of the electronic device 6, such as a plug-in hard disk equipped on the electronic device 6, a smart media card (SMC), a secure digital card (SD), a flash card, etc. Further, the memory 603 may also include both the internal storage unit and the external storage device of the electronic device 6. The memory 603 is used to store an operating system, application programs, a boot loader, data, and other programs, such as the program code of the computer program. The memory 603 may also be used to temporarily store data that has been output or will be output.

[0117] When the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, when implementing all or part of the processes in the above method embodiments of this application, a computer program can be used to instruct relevant hardware to complete the implementation. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps in the above method embodiments can be implemented. Among them, the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable storage medium can at least include: any entity or device that can carry the computer program code to the computing device / electronic device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, such as a USB flash drive, mobile hard disk, magnetic disk, or optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable storage medium cannot be an electrical carrier signal and a telecommunication signal.

[0118] An embodiment of this application also provides a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0119] An embodiment of this application provides a computer program product. When the computer program product runs on an electronic device, the electronic device is caused to execute the steps in the above method embodiments.

[0120] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed in this document can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0122] In the embodiments provided in the present application, it should be understood that the disclosed device / electronic device and method can be implemented in other ways. The device / electronic device embodiments described above are only illustrative. The above-mentioned module or unit division is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units and photovoltaic components can be combined or integrated into another system, and some features can be ignored and not executed. Another point is that the indirect coupling, direct coupling, or communication connection shown or discussed with each other can be an indirect coupling, direct coupling, or communication connection through some interfaces, devices, or units, and can be in electrical, mechanical, or other forms.

[0123] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A phased array detection method for transverse cracks in internal thread spiral water-cooled wall, characterized in that: The method comprises: According to the specifications and dimensions of the water-cooled wall to be inspected, a three-dimensional image data model of the water-cooled wall is established; Based on the image data model, simulating the transverse crack of the water-cooled wall to be detected; A simulation process is adopted, based on the simulated transverse crack, a special-shaped wedge is used to test the comparison test block to obtain the test result; the comparison test block and the water-cooled wall to be tested are of the same material and specification; Adjust the focal law parameters according to the test results to determine the real-time scanning imaging display form; The water-cooled wall to be inspected is scanned along the axial direction with the adjusted detection sensitivity, and the phased array detection result of the transverse crack of the water-cooled wall is determined based on the image corresponding to the real-time scanning imaging display form.

2. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 1 is characterized in that: The specifications and dimensions of the water-cooled wall to be inspected include: material, diameter, wall thickness, spiral climbing angle, thread thickness, thread width and thread pitch.

3. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 1, characterized in that: Based on the image data model, simulating the transverse crack of the water-cooled wall to be detected includes: A transverse crack is preset at the position of the internal thread spiral step in the image data model, and the preset transverse crack is simulated based on simulation parameters.

4. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 3 is characterized in that: The parameters of the preset transverse crack include: crack length, width, height and extension direction; the simulation parameters include: focal law parameters and imaging display form.

5. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 4 is characterized in that: The focal law parameters include: excitation aperture, deflection angle, step angle and focusing mode; The imaging display forms include: A-scan display, C-scan display and sector scan display; The parameters of the special-shaped wedge include: model, material, refraction angle, rotation angle and curvature; The comparison test block includes a specific reflector, which is a groove reflector with a preset depth and a preset length at the root of the thread along the internal thread direction and a preset angle with the axial direction of the comparison test block. There are one or more groove reflectors, and the groove reflectors represent transverse cracks. The parameters of the comparison test block include: the specification and material of the comparison test block, and the length, depth, height and extension direction of the groove reflector.

6. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 5, characterized in that: Using simulation technology, based on simulated transverse cracks, special-shaped wedges were used to test the comparison test blocks, and the test results were obtained, including: The special-shaped wedge is used to scan along the axial direction of the comparison test block to obtain a replacement transverse crack; Comparing the replaced transverse crack with the simulated transverse crack to obtain a comparison result; Wherein, during scanning, the incident acoustic beam is perpendicular to the grooved reflector along the spiral direction.

7. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 1, characterized in that: The method further comprises: Based on the encoder, the scanning path of scanning the water-cooled wall to be inspected is recorded.

8. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 5, characterized in that: The method further comprises: Scanning along the axial direction of the comparison test block, adjusting the echo amplitude of the specific reflector to reach a preset value of the full-screen amplitude of the imaging display image; The adjusted echo amplitude gain preset value is used as the standard detection sensitivity; Based on the standard detection sensitivity, compensating the detection sensitivity corresponding to different positions of the comparison test block to the standard detection sensitivity, and drawing a sensitivity curve based on the distance, amplitude and the standard detection sensitivity; The sensitivity curve indicates that the detection sensitivities corresponding to different positions are all the standard detection sensitivities.

9. The phased array detection method for transverse cracks in internal thread spiral water-cooled wall according to claim 8, characterized in that: The phased array detection result includes: the position, size and shape of the transverse crack; the water-cooled wall to be detected is scanned along the axial direction with the adjusted detection sensitivity, and the phased array detection result of the transverse crack of the water-cooled wall is determined based on the image corresponding to the real-time scanning imaging display form, including: Scanning the water-cooled wall to be inspected along the axial direction with the standard detection sensitivity to obtain an internal thread structure echo signal and a transverse crack echo signal; Based on the internal thread structure echo signal and the transverse crack echo signal, determining an image corresponding to the real-time scanning imaging display form; Based on the image corresponding to the real-time scanning imaging display form, identifying the internal thread structure echo signal and the transverse crack echo signal; The internal thread structure echo signal is eliminated, and the position, size and shape of the transverse crack of the water-cooled wall are determined based on the transverse crack echo signal.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the phased array detection method for transverse cracks in an internally threaded spiral water-cooled wall described in any one of claims 1 to 9 is implemented.

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