Ultrasonic phased array detection device suitable for GIS shell welding seam, GIS shell equipment and method

Abstract

The invention relates to an ultrasonic phased array detection device suitable for a GIS shell welding seam, GIS shell equipment and a method. The ultrasonic phased array detection device suitable for the GIS shell welding seam comprises a profiling track, a detection assembly and a movable clamping assembly. The profiling track is arranged along a welding seam, positioning pieces are arranged at the bottom at intervals, and the profiling track is flexibly adsorbed to the surface of a to-be-detected shell through the positioning pieces; the movable clamping assembly is movably arranged on the profiling track so as to drive the detection assembly to move along the welding seam; the detection assembly is installed on the movable clamping assembly and attached to the surface of a weld joint of the shell to be detected, and ultrasonic detection of weld joint defects is achieved. The ultrasonic phased array detection device suitable for the GIS shell welding seam is flexible in structure, reliable in movement, accurate in data acquisition and capable of effectively covering and accurately evaluating curve welding seams such as the GIS shell.

Description

Technical Field

[0001] This invention belongs to the field of weld inspection technology, and particularly relates to an ultrasonic phased array inspection device, GIS shell equipment and method suitable for weld seams of GIS shells. Background Technology

[0002] The GIS enclosure is a key structural component of gas-insulated metal-enclosed switchgear (GIS), possessing excellent airtightness, electromagnetic shielding, and mechanical strength. Its primary function is to provide support and sealing space for internal high-voltage components, and to be filled with insulating gases such as SF6 to achieve insulation and arc extinguishing. Since SF6 is a gas with a strong greenhouse effect, its leakage not only affects equipment functionality and power supply reliability but also severely impacts the atmospheric environment.

[0003] However, GIS shells are welded from metal sheets, which are prone to defects such as porosity, incomplete penetration, lack of fusion, and cracks during the welding process. Penetrant testing, when assessing the quality of fillet welds in GIS shells, can only detect surface opening defects and cannot detect internal defects. While conventional ultrasonic testing has a high detection rate for area-type defects, its ability to detect volumetric defects is limited, and the shape of defects cannot be directly observed, making qualitative analysis difficult and quantitative accuracy low.

[0004] Currently, GIS shells often employ complex curved weld structures during manufacturing. These welds are typically distributed on cylindrical or irregularly shaped curved surfaces of the shell, exhibiting significant nonlinear characteristics in their paths. When performing non-destructive testing (NDT) on these welds, traditional ultrasonic testing devices, unable to adapt to curved surfaces, often only achieve localized inspections, failing to provide full coverage of the weld path and thus affecting the accuracy and reliability of defect identification. Furthermore, existing devices rely on limited surface fixation methods, often employing rigid supports or magnetic attachment, which suffer from poor adaptability and stability with non-magnetic materials or surfaces with small curvature. The unstable coupling medium between traditional probes and welds also reduces ultrasonic transmission efficiency and imaging quality. Especially in cases of large GIS shells with frequent curvature changes or complex weld structures, existing testing devices generally suffer from inflexible structures, unstable movement, and inaccurate positioning, failing to meet the demands for efficient and high-precision NDT of complex curved welds.

[0005] Therefore, how to provide a detection device that is flexible in structure, reliable in movement, and accurate in data acquisition, and that can effectively cover and accurately evaluate curved welds in GIS shells and other similar structures, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To solve at least one of the above-mentioned technical problems, a first aspect of the present invention provides an ultrasonic phased array detection device suitable for weld seams of GIS shells, comprising: a contour track, a detection component, and a moving clamping component;

[0007] The contour track is set along the weld seam, and positioning elements are set at intervals at the bottom. The contour track is flexibly adsorbed onto the surface of the shell to be tested through the positioning elements.

[0008] The movable clamping assembly is movably mounted on the contour track to drive the detection assembly to move along the weld seam;

[0009] The detection component is mounted on the movable clamping component and fits against the weld surface of the shell to be tested, enabling ultrasonic detection of weld defects.

[0010] Furthermore, the detection components include: an ultrasonic phased array probe and a water jacket;

[0011] One end of the ultrasonic phased array probe is embedded in a water jacket;

[0012] The water jacket is installed on the movable clamping assembly;

[0013] The water jacket has a liquid-containing cavity inside, and its bottom is in contact with the weld surface.

[0014] Furthermore, the water jacket includes: a mounting cavity with a top opening;

[0015] The ultrasonic phased array probe is embedded in the mounting cavity;

[0016] The bottom of the ultrasonic phased array probe and the mounting cavity together enclose a liquid-containing cavity with an angled top.

[0017] The angled structure at the top of the liquid-containing cavity is matched with the direction of the ultrasonic phased array probe's acoustic beam.

[0018] Furthermore, the water jacket also includes: an inlet and an outlet;

[0019] Both the inlet and outlet are located in the upper region of the angled structure of the liquid containing cavity;

[0020] Furthermore, the height of the inlet is higher than the height of the interface between the ultrasonic phased array probe and the liquid in the liquid containment cavity.

[0021] Furthermore, the bottom of the water jacket is made of a flexible material to fit and conform to the surface of the shell to be tested and its weld area, so as to form a stable coupling interface.

[0022] Furthermore, the contour track includes: a track body, a first groove, and a second groove;

[0023] The main body of the track is a hollow structure and made of flexible material. It is flexibly attached to the surface of the shell to be tested through positioning parts and is laid out along the weld path of the shell to be tested.

[0024] The first groove is located in the area below the side wall of the track body to guide the moving clamping assembly to reciprocate on the track body;

[0025] The second groove is located in the area above the side wall of the track body and is used to accommodate the connection lines of the detection component and the moving clamping component.

[0026] Furthermore, the movable clamping assembly includes: a clamping body, rollers, and an encoder;

[0027] The clamping body has a clamping cavity in the center to accommodate the detection components;

[0028] The rollers are symmetrically located on both sides of the clamping body and are rotatably disposed within the first groove;

[0029] The encoder is mounted on the roller, with its first end connected to the detection component and its second end connected to an external analysis instrument, used to generate an image based on the detection results of the detection component.

[0030] Furthermore, the clamping body includes:

[0031] The structurally symmetrical clamping plate, the first link, the second link, and the third link;

[0032] The clamping plate has a slotted cavity in the center, and the clamping plates are arranged opposite each other to form a clamping cavity;

[0033] The slotted cavity of the clamping plate extends symmetrically to both sides to form auxiliary connecting parts;

[0034] The first connecting rod passes through the auxiliary connection part;

[0035] The first end of the second link is connected to the center of the first link, and the second end is connected to the center of the third link;

[0036] Rollers are symmetrically arranged at both ends of the third link.

[0037] In a second aspect, the present invention also provides a GIS housing device, including any of the above-mentioned ultrasonic phased array detection devices suitable for GIS housing welds.

[0038] A third aspect of the present invention provides an ultrasonic phased array detection method for weld seams of GIS shells, employing any of the above-mentioned ultrasonic phased array detection devices for weld seams of GIS shells, comprising the following steps:

[0039] An ultrasonic phased array testing device suitable for GIS shell welds is installed at the weld seam of the shell to be tested.

[0040] Adjust the detection components to maintain a preset distance from the weld seam of the housing under test;

[0041] The detection component is activated, and a combined primary and secondary sound field is used to detect and cover the weld area. The primary wave is used to detect defects at the lower end of the weld, and the secondary wave is used to detect defects at the upper end of the weld, thereby obtaining a sector scan image of the weld.

[0042] The moving clamping component controls the movement of the detection component along the weld path, combining sector scan images from different positions to form a C-scan imaging image covering the entire weld area, thus achieving comprehensive detection and localization of weld defects;

[0043] Quantitative analysis of defects is performed on the detection results based on the -6dB criterion of echo signal amplitude.

[0044] This embodiment presents an ultrasonic phased array inspection device suitable for GIS shell welds. Taking the manufacturing of GIS shells as an example, it solves the technical problems in the prior art, such as the difficulty in adapting inspection devices to different GIS weld structures, the difficulty in achieving full coverage inspection of the weld path, the instability of the inspection device's movement and positioning, and the difficulty in performing efficient and high-precision non-destructive testing on complex curved welds. In use, the contour track is arranged according to the shape of the GIS shell weld. Through the positioning component at the bottom, the contour track is flexibly and stably adsorbed onto the shell surface, achieving stable fit and precise positioning even on cylindrical or irregular curved surfaces. The contour track is set according to the weld path, ensuring that the detection path is highly consistent with the actual weld path, improving the integrity of the inspection. The detection component is mounted on the movable clamping component and maintains close contact with the weld surface. The movable clamping component moves smoothly along the contour track, driving the detection component to move synchronously, thereby achieving continuous scanning of the entire weld path. This device overcomes the problems of high structural rigidity, poor fit, and difficult positioning of traditional devices by using flexible conformal track fitting, stable coupling of detection components, and controllable movement of the moving clamping components. It is applicable to weld seams of GIS shells with various complex curved surfaces, improving the detection range and accuracy. Simultaneously, combined with the high resolution and imaging capabilities of phased array ultrasonic technology, it achieves accurate identification and quantitative assessment of internal weld defects, significantly improving detection efficiency, sensitivity, and reliability, meeting the quality control requirements in the manufacturing of high-reliability power equipment. In summary, this application provides an ultrasonic phased array detection device suitable for GIS shell weld seams, featuring flexible structure, reliable movement, and accurate data acquisition, capable of effectively covering and accurately assessing curved weld seams such as those in GIS shells. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. In the drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0046] Figure 1 This is a schematic diagram of an embodiment of the ultrasonic phased array detection device for weld seams of GIS shells, which is deployed on the shell to be tested.

[0047] Figure 2 This is a partial schematic diagram of an embodiment of the contour track of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0048] Figure 3 This is a schematic diagram of an embodiment of the movable clamping assembly and the detection assembly of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0049] Figure 4 This is a schematic diagram of an embodiment of the detection component of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0050] Figure 5 This is a schematic diagram of an embodiment of the water jacket of an ultrasonic phased array detection device for weld seams of GIS shells according to the present invention;

[0051] Figure 6 This is a schematic diagram of another embodiment of the water jacket of an ultrasonic phased array detection device for GIS shell welds according to the present invention, and a cross-sectional view at the BB position;

[0052] Figure 7 This is a schematic diagram of another embodiment of the detection component of an ultrasonic phased array detection device for GIS shell welds according to the present invention, and a cross-sectional view at position AA;

[0053] Figure 8 for Figure 1 A magnified view of a portion at point D;

[0054] Figure 9 This is a schematic diagram of an embodiment of a movable clamping assembly of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0055] Figure 10 This is a schematic diagram of an embodiment of the clamping body of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0056] Figure 11 This is a schematic diagram of a clamping plate component of an ultrasonic phased array detection device for GIS shell welds according to the present invention;

[0057] Figure 12 This is a schematic diagram illustrating the steps of an ultrasonic phased array detection method for weld seams in GIS shells according to the present invention.

[0058] Figure 13 This is a schematic diagram of a welding specimen for an ultrasonic phased array detection method applicable to GIS shell welds according to the present invention, and a partial enlarged view of weld specimen E.

[0059] Figure 14 for Figure 13 The images shown are the primary and secondary wave sector scan images obtained at the transverse hole locations A, B, and C. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0061] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0062] It should also be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., these directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. Furthermore, if the embodiments of the present invention involve descriptions such as "first," "second," "S1," "S2," "step one," "step two," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated or the order of method execution. Those skilled in the art will understand that anything that does not violate the inventive concept and does not contradict the inventive points should be included within the scope of protection of the present invention.

[0063] A first aspect of the present invention provides an ultrasonic phased array inspection device for weld seams of GIS shells, applicable to the inspection of curved weld seams on GIS shells, but not limited to weld seam inspection on GIS shells; see reference. Figure 1-3 It includes: contour track 1, moving clamping assembly 2 and detection assembly 3;

[0064] The contour track 1 is set along the weld seam, and positioning elements 11 are set at intervals at the bottom. The contour track 1 is flexibly adsorbed onto the surface of the shell 4 to be tested through the positioning elements 11.

[0065] The movable clamping assembly 2 is movably mounted on the contour track 1 to drive the detection assembly 3 to move along the weld seam;

[0066] The detection component 3 is mounted on the movable clamping component 2 and fits against the weld surface of the housing 4 to be tested, so as to realize ultrasonic detection of weld defects.

[0067] This embodiment presents an ultrasonic phased array inspection device suitable for GIS shell welds. Taking the manufacturing of GIS shells as an example, it solves the technical problems in the prior art, such as the difficulty in adapting inspection devices to different GIS weld structures, the difficulty in achieving full coverage inspection of the weld path, the instability of the inspection device's movement and positioning, and the difficulty in performing efficient and high-precision non-destructive testing on complex curved welds. In use, the contour track is arranged according to the shape of the GIS shell weld. Through the positioning component at the bottom, the contour track is flexibly and stably adsorbed onto the shell surface, achieving stable fit and precise positioning even on cylindrical or irregular curved surfaces. The contour track is set according to the weld path, ensuring that the detection path is highly consistent with the actual weld path, improving the integrity of the inspection. The detection component is mounted on the movable clamping component and maintains close contact with the weld surface. The movable clamping component moves smoothly along the contour track, driving the detection component to move synchronously, thereby achieving continuous scanning of the entire weld path. This device overcomes the problems of high structural rigidity, poor fit, and difficult positioning of traditional devices by using flexible conformal track fitting, stable coupling of detection components, and controllable movement of the moving clamping components. It is applicable to weld seams of GIS shells with various complex curved surfaces, improving the detection range and accuracy. Simultaneously, combined with the high resolution and imaging capabilities of phased array ultrasonic technology, it achieves accurate identification and quantitative assessment of internal weld defects, significantly improving detection efficiency, sensitivity, and reliability, meeting the quality control requirements in the manufacturing of high-reliability power equipment. In summary, this application provides an ultrasonic phased array detection device suitable for GIS shell weld seams, featuring flexible structure, reliable movement, and accurate data acquisition, capable of effectively covering and accurately assessing curved weld seams such as those in GIS shells.

[0068] Example, reference Figure 2The positioning component 11 is a flexible suction cup or other component with flexible adsorption function, spaced apart at the bottom of the contour track 1. Taking the flexible suction cup as an example, this flexible suction cup has good surface adaptability and can adapt to changes in curvature of the outer surface of the GIS shell, achieving stable adsorption even in complex curved areas. Through the distributed arrangement of multiple flexible suction cups, the entire contour track can be reliably fixed to the target detection area without damaging the shell surface, effectively avoiding the problem of insufficient adaptability of rigid support or magnetic adsorption methods on non-magnetic materials or shells with small curvature, ensuring that the track does not slip or warp during the detection process, and improving the stability and detection accuracy of track positioning. The flexible suction cup also has air pressure adjustment or manual operation functions, which can realize the rapid fixing and removal of the track, greatly improving the detection efficiency.

[0069] Preferred, Reference Figure 2-6 The detection component 3 includes: an ultrasonic phased array probe 31 and a water jacket 32;

[0070] One end of the ultrasonic phased array probe 31 is embedded in the water jacket 32;

[0071] Water jacket 32 ​​is installed on movable clamping assembly 2;

[0072] The water jacket 32 ​​has a liquid containing cavity 322 inside, and its bottom is in contact with the weld surface.

[0073] In this embodiment, the ultrasonic phased array probe is embedded in a water jacket, and the probe moves by moving the clamping assembly. Compared with the existing method of directly applying a coupling agent (such as coupling adhesive or coupling liquid) between the probe and the weld surface, this embodiment achieves a more stable and efficient coupling effect by using a water jacket filled with liquids such as water or oil, and also provides a certain degree of heat insulation and anti-fouling effect. The liquid (such as water or oil), contained in the water jacket, serves as a uniform coupling medium. Compared with directly applying a coupling agent, this avoids the problems of traditional coupling agents such as easy flow, uneven distribution, poor adhesion, easy contamination, and inconvenient operation on complex curved surfaces, thus improving the transmission efficiency and detection sensitivity of ultrasound. Especially during probe movement, the water jacket can maintain a continuous coupling state, reducing the risk of signal interruption or distortion, thereby significantly improving imaging quality and detection accuracy, ensuring continuous, efficient, and non-destructive testing of complex welds in GIS shells. In addition, using water or oil in the water jacket as a coupling method is also environmentally friendly. Furthermore, the flexible and conformable bottom structure of the water jacket allows it to adhere tightly to the surface of curved welds. Even with complex curvatures or localized irregular deformations, it ensures effective contact between the detection components and the weld, improving detection consistency. Moreover, the water jacket provides physical isolation, protecting the probe body from direct contact with the metal weld surface, reducing the risk of probe wear, and minimizing interference from mechanical vibrations on the detection signal.

[0074] For example, the ultrasonic phased array probe has a frequency of 5MHz, a crystal size of 10*0.4mm, a number of crystals of 32, and a crystal gap of 0.1mm. While ensuring sufficient penetration capability, it can achieve high-resolution imaging of complex curved weld seams. It is suitable for the fine inspection of weld seams in GIS shells, especially curved weld seams, and further improves the accuracy and reliability of defect identification.

[0075] Preferred, Reference Figure 5-7 The water jacket 32 ​​includes: a mounting cavity 321 with a top opening;

[0076] An ultrasonic phased array probe 31 is embedded in the mounting cavity 321;

[0077] The bottom of the ultrasonic phased array probe and the mounting cavity 321 together enclose a liquid-containing cavity 322 with an angled top.

[0078] The angled structure at the top of the liquid-containing cavity 322 is matched with the direction of the ultrasonic beam of the ultrasonic phased array probe 31.

[0079] In this embodiment, the water jacket has an open mounting cavity at the top, allowing the ultrasonic phased array probe to be securely embedded. The probe's bottom, in conjunction with the mounting cavity, forms a liquid-containing cavity with an angled structure. Notably, the key to this water jacket lies in the fact that the bottom of the ultrasonic phased array probe and the mounting cavity together enclose the liquid-containing cavity with an angled top. The angle of this angled structure matches the emission direction of the probe's sound beam, enabling the ultrasonic waves to smoothly enter the liquid medium at a preset incident angle after emission, reducing reflection and energy loss at the liquid interface and propagating along the designed path to the weld surface. This angled structure, seemingly simple, is the result of the inventor's creative labor, possessing outstanding substantial features and significant progress: it not only effectively avoids reflection and scattering at the liquid interface, reducing energy loss, but also, by controlling the excitation time of each crystal, achieves beam deflection and focusing, forming a focused sound field inside the workpiece, thereby improving the coupling efficiency and detection sensitivity of the ultrasonic waves. Through this optimized coupling path design, the strength and clarity of defect signals can be further improved, significantly enhancing the accuracy of identifying internal defects in complex welds.

[0080] More preferably, refer to Figure 7 The liquid-containing cavity 322 is a hollow wedge shape, and the angle θ of the top bevel structure is 19.9°~23.9°, which can be selected as 21.9°.

[0081] Preferred, Reference Figure 5-7 The water jacket 32 ​​also includes: an inlet 323 and an outlet 324;

[0082] Both the inlet 323 and the outlet 324 are located in the upper region of the angled structure of the liquid receiving cavity 322;

[0083] Furthermore, the height of the inlet 323 is higher than the height of the interface between the ultrasonic phased array probe 31 and the liquid in the liquid container 322.

[0084] In this embodiment, both the inlet and outlet are located on the upper side of the angled structure of the liquid-containing cavity. The height of the inlet is higher than the height of the interface between the ultrasonic phased array probe and the liquid within the liquid-containing cavity. This allows the liquid, injected from the high-level inlet, to fill the entire liquid-containing cavity from top to bottom under the influence of gravity and liquid pressure difference, and finally exit through the outlet. This ensures that the liquid can be continuously injected into the liquid-containing cavity from a high position, filling the entire space facing the weld within the cavity, forming a stable, continuous, and bubble-free liquid coupling layer. This effectively prevents bubble generation and coupling interruption, ensuring no gas interference in the sound beam propagation path. It also maintains the cleanliness and temperature stability of the liquid medium in the water jacket, improving the coupling efficiency and detection stability of the sound beam.

[0085] Preferably, the bottom of the water jacket is made of a flexible material to fit and conform to the surface of the shell to be tested and its weld area, so as to form a stable coupling interface.

[0086] In this embodiment, the bottom is made of a flexible material, which can adapt to the curvature and micro-irregularities of the shell under test, achieving a tight, air-gap-free water coupling interface, thus avoiding the limitations of traditional rigid probes that cannot adapt to complex curved surfaces. For example, the flexible bottom can be made of flexible materials such as flexible rubber or flexible silicone. This not only allows for flexible contact with the weld seam but also prevents the weld seam from cooling in time, which could affect coupling performance or cause a decrease in the performance of the ultrasonic phased array probe.

[0087] Preferred, Reference Figure 1 , Figure 2 and Figure 8 The contour track 1 also includes: track body 12, first groove 13 and second groove 14;

[0088] The track body 12 is a hollow structure and is flexibly attached to the surface of the shell 4 to be tested through the positioning component 11, and is arranged along the weld path of the shell 4 to be tested.

[0089] The first groove 13 is provided in the area below the side wall of the track body 11 to guide the moving clamping assembly 2 to reciprocate on the track body 11;

[0090] The second groove 14 is located in the area above the side wall of the track body 11 and is used to accommodate the connection lines of the detection component 3 and the moving clamping component 2.

[0091] In this embodiment, the contouring track structure uses a hollow track body and a positioning component to achieve flexible contact with the surface of the GIS shell to be tested. This allows the track body to be precisely positioned along the weld seam path. The first groove guides the moving clamping component to move smoothly back and forth on the track, improving the smoothness of the probe scan and the accuracy of path control. The second groove provides an orderly and safe wiring channel for the connection lines between the detection component and the moving clamping component, avoiding interference, entanglement, or wear caused by exposed wiring, thereby improving the overall reliability and detection efficiency of the device. More preferably, the track body of the contouring track is made of a flexible material, which can be fitted and positioned according to the curvature of the GIS shell surface to be tested.

[0092] For example, the bottom surface of the contour guide rail has the same shape as the weld seam surface and is equipped with a series of suction cups. The contour guide rail is 60mm high and 74mm wide, with a hollow structure in the middle that is 60mm deep and 55mm wide, for placing the detection component and the moving clamping component. A first groove with a height of 2mm and a width of 2mm is machined on each side wall of the lower region of the contour guide rail. 31.6mm above the first groove, a second groove with the same length as the weld seam, a height of 2mm and a width of 2mm, and penetrating the side wall of the contour guide rail is machined for mounting the encoder wires as described later.

[0093] Preferred, Reference Figure 9 The movable clamping assembly 2 includes: a clamping body 21, a roller 22, and an encoder 23;

[0094] The clamping body 21 has a clamping cavity 2111 in the center to accommodate the detection component 3;

[0095] The rollers 22 are symmetrically located on both sides of the clamping body 21 and are rotatably disposed in the first groove 13;

[0096] The encoder 23 is mounted on the roller 22, and the first end of the encoder 23 is connected to the detection component 3, and the second end is connected to an external analysis instrument, which is used to generate an image based on the detection result of the detection component 3.

[0097] In this embodiment, a clamping cavity is provided in the clamping body to stably accommodate and fix the detection component, ensuring that it maintains a precise position throughout the detection process. Rollers are symmetrically distributed and installed on both sides of the clamping body, enabling smooth rolling within the first groove. This ensures the stable and smooth movement of the moving clamping component along the track, effectively improving the continuity of the scanning path and the integrity of the detection image. An encoder is mounted on the rollers to directly acquire movement position information. Through data linkage with the detection component and external analysis instruments, it records the correspondence between the scanning position and the detection signal in real time, thereby achieving image reconstruction and visualization output of the detection results. This significantly improves the accuracy of weld defect detection and the system's intelligence level.

[0098] Preferred, Reference Figure 10-11 The clamping body 21 includes: a symmetrical clamping plate 211, a first connecting rod 212, a second connecting rod 213 and a third connecting rod 214;

[0099] The clamping plate 211 has a slotted cavity 211a in the center, and is arranged opposite to each other to form a clamping cavity 2111;

[0100] The slotted cavity 211a of the clamping plate 211 extends symmetrically to both sides to form auxiliary connecting parts 211b;

[0101] The first connecting rod 212 passes through the auxiliary connecting part 211b;

[0102] The first end of the second link 213 is connected to the central part of the first link 212, and the second end is connected to the central part of the third link 214.

[0103] Rollers 22 are symmetrically arranged at both ends of the third link 214.

[0104] In this embodiment, the clamping body adopts a symmetrical clamping plate design with a central slot forming a clamping cavity, which can stably accommodate the detection component and ensure fixation accuracy and vibration resistance during the detection process. The slotted cavity of the clamping plate extends symmetrically to both sides to form auxiliary connecting parts, facilitating the insertion and connection of the first connecting rod, achieving a stable connection of the clamping plates and enhancing overall rigidity. The first end of the second connecting rod is connected to the central part of the first connecting rod, and the second end is connected to the central part of the third connecting rod; rollers are symmetrically arranged at both ends of the third connecting rod, and the rollers cooperate with the guide rail to ensure accurate guidance and smooth movement of the clamping body during the movement process, avoiding deviation and jamming.

[0105] In a second aspect, the present invention also provides a GIS housing device, including any of the above-mentioned ultrasonic phased array detection devices suitable for GIS housing welds.

[0106] In this embodiment, a GIS shell device is provided, employing the aforementioned ultrasonic phased array testing device. This device enables efficient and accurate online non-destructive testing of the shell welds during equipment operation or testing. The device can adapt to complex curved weld structures, ensuring good contact and stable movement between the ultrasonic phased array probe and the weld surface, thereby improving detection coverage, reducing blind spots, and significantly enhancing the accuracy and reliability of defect identification.

[0107] A third aspect of the invention, with reference to Figure 12 This invention provides an ultrasonic phased array testing method for weld seams of GIS shells, employing any of the aforementioned ultrasonic phased array testing devices suitable for GIS shell weld seams, comprising the following steps:

[0108] S1: Install an ultrasonic phased array testing device suitable for GIS shell welds at the weld seam of the shell to be tested;

[0109] S2: Adjust the detection component to maintain a preset distance from the weld seam of the housing to be tested;

[0110] S3: Activate the detection component and use a combination of primary and secondary sound fields to detect and cover the weld area. The primary wave is used to detect defects at the lower end of the weld, and the secondary wave is used to detect defects at the upper end of the weld, and obtain a sector scan image of the weld.

[0111] S4: Move the clamping assembly to control the detection assembly to move along the weld path, combine sector scan images from different positions to form a C-scan imaging image covering the entire weld area, and realize comprehensive detection and location of weld defects;

[0112] S5: Quantitative analysis of defects based on the -6dB criterion of echo signal amplitude.

[0113] In this embodiment, an ultrasonic phased array detection method for weld seams is provided. Any of the aforementioned ultrasonic phased array detection devices suitable for GIS shell weld seams are deployed at the weld seam location of the GIS shell. The detection component is adjusted to maintain a preset distance (e.g., 7mm) from the weld seam of the shell under test, achieving precise coupling and position control between the detection component and the weld seam, ensuring effective transmission of ultrasonic energy. The detection component is activated. Due to the limitation of the ultrasonic phased array probe deflection angle, the coverage of the primary sound field is limited, resulting in a detection blind zone. The primary and secondary sound fields are used together to cover the entire weld seam area, achieving high-sensitivity detection of weld defects. The method employs a primary wave to detect defects at the lower end of the weld and a secondary wave to detect defects at the upper end, obtaining a sector scan image of the weld. A moving clamping assembly drives the detector to move smoothly along a preset path along the weld. The detection assembly performs sector scans of the primary and secondary sound fields at different detection positions. By combining these images, a complete C-scan image of the weld is obtained, enabling visualized and continuous defect monitoring across the entire weld area. Furthermore, based on the acquired echo signals, a -6dB amplitude criterion is used for quantitative defect analysis, including the extraction of defect depth, size, and location information, facilitating subsequent assessment of defect nature and risk level. This method effectively eliminates blind spots in traditional detection through the coordinated detection of primary and secondary waves. Combined with a moving clamping assembly and contoured guide rails, it enables adaptable deployment of the equipment to complex curved surfaces and variable-diameter structures of the GIS shell, significantly improving the comprehensiveness, accuracy, and efficiency of GIS shell weld inspection.

[0114] Example, reference Figure 13 The ultrasonic phased array detection method of the present invention is used to detect defects in a weld sample 5 with a thickness of 15 mm taken from 1 / 2 of the GIS shell.

[0115] In this embodiment, an ultrasonic phased array detection device suitable for GIS shell welds is installed at the weld seam of the shell to be tested. Three artificial defects with different intervals (e.g., distances of 3m, 8mm, and 13mm from one side of the sample surface) are machined at the weld seam location of the sample. The transverse holes are 10×φ0.5mm in size (10mm in depth and 0.5mm in diameter) and numbered A, B, and C. The detection assembly is used to detect the sample at a position 7mm from the center of the weld. By setting the focusing depth to 20mm, the scanning range to 40mm, the aperture to 32mm, and the sector scanning angle to 40°–70°, primary and secondary waves are simultaneously emitted for sector scanning imaging, thus achieving sector scanning imaging of the weld area.

[0116] Image shown: Reference Figure 14 The first wave can cover and clearly image transverse holes B and C (reference). Figure 14 The primary wave fan-scan image shows that transverse aperture A, being at the edge of the sound field, is not covered by the primary wave; the secondary wave sound field has a wider coverage area and can simultaneously detect and image the reflection images of all three transverse apertures (A, B, C) (see reference). Figure 14 (Second wave sector scan image). In the image, each horizontal hole is elliptical, with high amplitude in the center and low amplitude at the edges, reflecting a good signal-to-noise ratio and clear positioning. Combining primary and secondary waves enables full-coverage imaging of the weld area: the primary wave beam is concentrated and has high resolution, suitable for shallow defect detection; the secondary wave sound field has a wider coverage area, compensating for the blind spots of primary wave detection, and is suitable for deep defect detection. The two complement each other, improving the integrity and accuracy of defect imaging, reducing the risk of missed detections, and enhancing the overall detection effect. It can be understood that by continuously moving the detection component along the weld path using the moving clamping assembly, continuous sector scan images can be obtained, and combined to obtain a C-scan image covering the entire weld area, achieving comprehensive detection and positioning of weld defects.

[0117] Further quantitative analysis was performed using the -6dB method, with focusing depths set to 10mm and 20mm respectively, to measure the burial depth and dimensions of the transverse holes. The results showed that the primary wave method, due to its shorter path and smaller beam diffusion, had a relatively lower burial depth measurement error and higher imaging resolution; the secondary wave method had a wider coverage but larger beam diffusion, resulting in a relatively higher quantitative error. Although the dimensional measurement error was relatively large, it could still effectively reflect the relative distribution of defects. This demonstrates that the ultrasonic phased array detection device and method for GIS shell welds provided by this invention can achieve sector scan imaging, C-scan imaging, and quantitative analysis of defects in the weld area, with a wide detection range and high accuracy, meeting the practical needs of GIS shell weld inspection.

[0118] The aforementioned GIS shell equipment and ultrasonic phased array detection method for GIS shell welds are based on the aforementioned ultrasonic phased array detection device for GIS shell welds. The combination of their technical effects and features will not be elaborated further here. The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An ultrasonic phased array inspection apparatus suitable for use in the inspection of a weld of a GIS enclosure, characterized in that, The application relates to a GIS shell welding seam ultrasonic phased array detection device. The device comprises a profiling track, a detection assembly and a movable clamping assembly. The profiling track is arranged along a welding seam and is provided with positioning members at intervals on the bottom. The movable clamping assembly is movably arranged on the profiling track to drive the detection assembly to move along the welding seam. The detection assembly is installed on the movable clamping assembly and is attached to the welding seam surface of the shell to be detected to realize ultrasonic detection of welding seam defects.

2. The ultrasonic phased array inspection apparatus suitable for GIS enclosure welds of claim 1, wherein, The detection assembly comprises an ultrasonic phased array probe and a water jacket. One end of the ultrasonic phased array probe is embedded in the water jacket. The water jacket is installed on the movable clamping assembly. The water jacket is provided with a liquid containing cavity in the inside, and the bottom is attached to the welding seam surface.

3. The ultrasonic phased array inspection apparatus suitable for GIS enclosure welds of claim 2, wherein, The water jacket comprises an open-top mounting cavity. The ultrasonic phased array probe is embedded in the mounting cavity. The bottom of the ultrasonic phased array probe and the mounting cavity jointly form a liquid containing cavity with an inclined angle structure at the top. The inclined angle structure at the top of the liquid containing cavity is matched with the sound beam direction of the ultrasonic phased array probe.

4. The ultrasonic phased array inspection apparatus suitable for GIS enclosure welds of claim 3, wherein, The water jacket further comprises a water inlet and a water outlet. The water inlet and the water outlet are arranged on the upper side region of the inclined angle structure of the liquid containing cavity. The height of the water inlet is higher than the position height of the liquid coupling interface between the ultrasonic phased array probe and the liquid in the liquid containing cavity.

5. The ultrasonic phased array testing device suitable for GIS enclosure welds of claim 2, wherein, The bottom of the water jacket is made of flexible material and is used for adapting to the surface of the shell to be detected and the welding seam region of the shell to be detected to form a stable coupling interface.

6. The ultrasonic phased array testing device suitable for GIS enclosure welds of claim 1, wherein, The profiling track comprises a track main body, a first groove and a second groove. The track main body is a hollow structure and is made of flexible material. The first groove is arranged below the side wall of the track main body to guide the movable clamping assembly to reciprocate on the track main body. The second groove is arranged above the side wall of the track main body and is used for accommodating the connecting lines of the detection assembly and the movable clamping assembly.

7. The ultrasonic phased array testing device suitable for GIS enclosure welds according to claim 6, characterized in that, The movable clamping assembly comprises a clamping main body, a roller and an encoder. The clamping main body is centrally provided with a clamping cavity to accommodate the detection assembly. The rollers are symmetrically arranged on both sides of the clamping main body and are rollably arranged in the first groove. The encoder is arranged on the roller.

8. The ultrasonic phased array inspection apparatus suitable for GIS enclosure welds of claim 7, wherein, The first end of the encoder is connected with the detection assembly, and the second end is connected with an external analysis instrument to generate an image according to the detection result of the detection assembly. The clamping main body comprises symmetrically-structured clamping plate members, a first connecting rod, a second connecting rod and a third connecting rod. The clamping plate members are centrally provided with slotted cavities and are oppositely arranged to form the clamping cavity. The slotted cavities of the clamping plate members symmetrically extend to both sides to form auxiliary connecting portions. The first connecting rod is arranged in the auxiliary connecting portion. The second connecting rod is connected with the central portion of the first connecting rod at the first end and is connected with the central portion of the third connecting rod at the second end. The third connecting rod is symmetrically provided with the rollers at both ends. The application further discloses a GIS shell device comprising the GIS shell welding seam ultrasonic phased array detection device.

10. A method for ultrasonic phased array inspection of a weld, using the ultrasonic phased array inspection device for welds of GIS enclosures according to any one of claims 1 to 8, characterized by the steps of The application further discloses a GIS shell welding seam ultrasonic phased array detection device. The detection assembly is adjusted to keep a preset distance from the welding seam of the shell to be detected. ​ The detection assembly is started to detect the weld area by using a primary sound field and a secondary sound field, wherein the primary wave is used to detect defects at the lower end of the weld, the secondary wave is used to detect defects at the upper end of the weld, and a fan scanning imaging image of the weld is obtained; The detection assembly is moved along the weld path to form a C scanning imaging image covering the whole area of the weld by combining fan scanning images at different positions, so that comprehensive detection and positioning of the weld defects are realized; The detection results are subjected to quantitative analysis of defects based on a-6dB criterion of echo signal amplitude.

Images