Water immersion ultrasonic probe for detecting welding seam at end part of side wall and detection method

Abstract

The invention discloses a water immersion ultrasonic probe for detecting a side wall end welding seam and a detection method, and belongs to the technical field of welding seam detection.The water immersion ultrasonic probe for detecting the side wall end welding seam comprises a shell, an ultrasonic transducer core assembly and a cable connecting assembly.The shell comprises a main body part and a detection part which are connected; the detection part is provided with an open accommodating cavity; the ultrasonic transducer core assembly is embedded in the containing cavity and connected with the detection part, the ultrasonic transducer core assembly comprises a matching layer, a piezoelectric wafer and a backing block which are sequentially stacked, the matching layer is arranged on the side, away from the main body part, of the piezoelectric wafer, and the ultrasonic transducer core assembly is configured to be used for transmitting and receiving ultrasonic signals to the side wall end welding seam; one end of the cable connecting assembly is connected with the ultrasonic transducer core assembly and embedded in the main body part, and the other end of the cable connecting assembly is configured to be used for being connected with analysis equipment, so that the detection effect of the side wall end welding seam can be improved.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology, and in particular to a water immersion ultrasonic probe and inspection method for inspecting welds at the end of sidewalls. Background Technology

[0002] Sidewall end welds are widely used in aerospace, nuclear power, rail transportation, automobile and thick plate structure manufacturing, especially in applications with extremely high requirements for sealing, fatigue strength and sidewall fusion quality, such as rocket and spacecraft tank structures, nuclear power or pressure vessels, thick plate narrow gap welding, friction stir welding, and aluminum alloy structural parts for aerospace or automobiles.

[0003] In related technologies, the side wall end welds (especially the side walls of thick plate bevels, saddle-shaped welds, etc.) are high-incidence areas of welding defects due to their narrow geometry and concealed fusion surfaces, while current testing equipment generally has the defect of poor detection effect. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a water immersion ultrasonic probe for detecting welds at the end of sidewalls, which is beneficial to improving the detection effect of welds at the end of sidewalls.

[0005] The present invention also proposes a detection method.

[0006] An embodiment of the first aspect of the present invention provides a water immersion ultrasonic probe for detecting sidewall end welds, comprising: a housing including a main body and a detection part connected to each other, the detection part having an open receiving cavity; an ultrasonic transducer core assembly embedded in the receiving cavity and connected to the detection part, the ultrasonic transducer core assembly including a matching layer, a piezoelectric crystal, and a backing block stacked sequentially, the matching layer being disposed on the side of the piezoelectric crystal away from the main body, the ultrasonic transducer core assembly being configured to transmit and receive ultrasonic signals to the sidewall end weld; and a cable connection assembly, one end of which is connected to the ultrasonic transducer core assembly and embedded in the main body, the other end being configured to be connected to an analysis device.

[0007] The water immersion ultrasonic probe for detecting sidewall end welds according to embodiments of the present invention has at least the following advantages: the housing includes a main body and a detection part connected together. The main body serves as a connecting body, while the detection part has an open receiving cavity. An ultrasonic transducer core assembly is embedded in the receiving cavity and connected to the detection part, i.e., the detection part covers the ultrasonic transducer core assembly. Through the structural and relative positional design of the detection part and the main body, the water immersion ultrasonic probe for detecting sidewall end welds is suitable for use in narrow spaces of sidewall end welds, effectively reducing the geometric blind zone for detecting sidewall end welds; the detection part can be immersed together with the sidewall end weld of the workpiece being inspected. In the coupling fluid, the ultrasonic transducer core assembly has a matching layer, a piezoelectric crystal, and a backing block stacked sequentially. The matching layer is located on the side of the piezoelectric crystal away from the main body. The ultrasonic transducer core assembly is used to transmit and receive ultrasonic signals to the sidewall end weld. Utilizing the ultrasonic echo principle, water immersion coupling is used for non-destructive testing of the workpiece. One end of the cable connection assembly is connected to the ultrasonic transducer core assembly, and the other end is configured to connect to the analysis equipment. The ultrasonic transducer core assembly can transmit the received ultrasonic signals to the analysis equipment. The analysis equipment obtains relevant information about the defects of the sidewall end weld through the signal characteristics of the reflected waves, thereby improving the detection effect of the sidewall end weld.

[0008] According to some embodiments of the present invention, the main body and the detection part are arranged at an angle.

[0009] According to some embodiments of the present invention, the length direction of the main body is perpendicular to the opening direction of the receiving cavity of the detection part.

[0010] According to some embodiments of the present invention, the piezoelectric wafer is one or more combinations of linear array wafers, area array wafers, self-focusing linear array wafers, and self-focusing area array wafers.

[0011] According to some embodiments of the present invention, the piezoelectric wafer has a self-focusing curvature.

[0012] According to some embodiments of the present invention, the receiving cavity is open in a first direction, and the size of the detection part in the second direction is the sum of the size of the ultrasonic transducer core assembly in the second direction and a preset size. The second direction is perpendicular to the first direction, and the preset size is 0.6mm-1mm.

[0013] According to some embodiments of the present invention, the detection unit has a first wall and a second wall disposed on opposite sides of the ultrasonic transducer core assembly, and the thickness of the first wall and the second wall is 0.3mm-0.5mm. And / or, the preset size is 1mm.

[0014] According to some embodiments of the present invention, the water immersion ultrasonic probe for detecting the sidewall end weld further includes a connecting frame, a housing, an ultrasonic transducer core assembly, and a cable connection assembly, which together constitute a probe head. Two probe heads are provided, and the two probe heads are connected side by side to the connecting frame. The ultrasonic transducer core assemblies of the two probe heads are arranged facing each other, and a detection space for accommodating the sidewall end weld is constructed between the ultrasonic transducer core assemblies of the two probe heads. The two probe heads can detect the opposite sides of the sidewall end weld.

[0015] The detection method of a second aspect of the present invention is applied to a water immersion ultrasonic probe used in the first aspect for detecting weld seams at the end of sidewalls. The detection method includes: Position and fix the workpiece to be inspected, which has side wall end welds; The parameters of the ultrasonic transducer core assembly and the relative positional relationship between the main body and the detection part are determined based on the side wall end welds. Immerse both the side wall end weld and the detection part in the coupling fluid, and adjust the distance between the ultrasonic transducer core assembly and the side wall end weld to the preset distance. The ultrasonic transducer core assembly emits ultrasonic signals toward the weld seam at the end of the side wall and transmits the received ultrasonic signals to the analysis equipment for analysis via a cable connection assembly.

[0016] According to some embodiments of the present invention, the water immersion ultrasonic probe for detecting the weld seam at the end of the side wall further includes a connecting frame, and the housing, the ultrasonic transducer core assembly and the cable connection assembly together constitute a probe head, and two probe heads are provided; Adjusting the distance between the ultrasonic transducer core assembly and the sidewall end weld to a preset distance also includes: The two probes are connected side by side to the connecting frame, so that the ultrasonic transducer core components of the two probes are facing each other. The spacing between the two ultrasonic transducer core components is adjusted so that a detection space is constructed between the ultrasonic transducer core components of the two probes to accommodate the sidewall end weld. The two probes are configured to detect the opposite sides of the sidewall end weld.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a water immersion ultrasonic probe for detecting sidewall end welds according to an embodiment of the present invention; Figure 2This is an exploded view of the ultrasonic transducer core assembly of a water immersion ultrasonic probe for detecting sidewall end welds according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the water immersion ultrasonic probe for detecting sidewall end welds according to an embodiment of the present invention, showing the combination of the housing and the ultrasonic transducer core assembly. Figure 4 This is a schematic diagram of the structure of the water immersion ultrasonic probe housing and ultrasonic transducer core assembly for detecting sidewall end welds according to an embodiment of the present invention, from another perspective. Figure 5 This is a schematic diagram of various structures of the piezoelectric crystal of a water immersion ultrasonic probe for detecting sidewall end welds according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the two probes of the water immersion ultrasonic probe for detecting the weld seam at the end of the side wall according to an embodiment of the present invention and the connecting frame; Figure 7 This is a schematic diagram of the connection between the two probes of the water immersion ultrasonic probe for detecting the weld seam at the end of the side wall according to an embodiment of the present invention and the connecting frame; Figure 8 This is a top-down structural diagram of the connection between the two probes of the water immersion ultrasonic probe for detecting the weld seam at the end of the side wall according to an embodiment of the present invention and the connecting frame. Figure 9 This is a flowchart of a detection method according to an embodiment of the present invention; Figure 10 This is a flowchart illustrating the adjustment of the relative positions of two probes in a detection method according to an embodiment of the present invention.

[0019] Icon labels: 100. Shell; 110. Main body; 120. Detection unit; 121. Receiving cavity; 200. Ultrasonic transducer core assembly; 210. Matching layer; 220. Piezoelectric crystal; 230. Backing block; 300. Cable connection assembly; 310. Flexible circuit board; 320. Sheathed connector; 330. Cable; 340. Connector; 350. Housing; 400. Analytical equipment; 500. Connecting bracket; 610. Detection space; 620. Sound beam coverage area; 700. Side wall end weld; 800. Inspect the workpiece. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Sidewall end welds of type 700 are widely used in aerospace, nuclear power, rail transportation, automotive, and thick plate structure manufacturing, especially in applications requiring extremely high sealing performance, fatigue strength, and sidewall fusion quality. The application scope of sidewall end welds of type 700 primarily covers high-end, thick plate, or structurally complex welding scenarios, specifically including: 1. Rocket and spacecraft tank structure In the propellant tank of a launch vehicle, a saddle-shaped weld is formed at the intersection of the side wall and the flange. TIG (tungsten inert gas welding) is often used for the root pass and the cover pass. This is a typical application of the 700 side wall end weld. Its sealing performance and dimensional stability directly affect the success or failure of the launch.

[0025] 2. Welding of thick plates with narrow gaps (nuclear power, pressure vessels, etc.) In narrow-gap bevels of plates thicker than 50 mm, sidewall fusion is a critical quality control point. Whether it is twin-wire GMAW (gas metal arc welding), NG-GTAW (narrow-gap tungsten inert gas welding), or laser filler wire welding, the problem of sidewall incomplete fusion must be specifically addressed, and it is widely used in nuclear power, chemical containers, and ultra-high-strength steel structures.

[0026] 3. High-speed trains and rail transit vehicles Friction stir welding (FSW) is used for welding the side walls and roof components of high-speed trains to form butt or lap welds at the ends of the side walls, meeting the requirements of high strength and low deformation.

[0027] 4. Aluminum alloy structural components (aerospace, automotive) In laser or arc welding of 6061, 2000, and 7000 series aluminum alloys, the 700mm sidewall end weld is commonly found in components such as battery casings, vehicle frames, and cooling systems, and it is necessary to control porosity and lack of fusion defects.

[0028] The 700mm end welds on sidewalls (especially thick plate bevel sidewalls, saddle-shaped welds, etc.) are high-risk areas for welding defects due to their narrow geometry and concealed fusion surfaces. Their inspection must consider volume coverage, sensitivity, and positioning accuracy. The common pain points exposed in non-destructive testing of the 700mm end welds on sidewalls (especially thick-walled narrow-gap, saddle-shaped, or corner welds) are the triple superposition of geometric blind spots, weak reflection, and insufficient near-surface resolution. This results in a high risk of missed detection by current ultrasonic (PAUT / TOFD) methods in three major scenarios: near-surface 0–4mm, opposite fusion surfaces, and coarse-grained materials.

[0029] Reference Figures 1 to 8 As shown, an embodiment of the present invention provides a water immersion ultrasonic probe for detecting the side wall end weld 700, comprising: a housing 100, an ultrasonic transducer core assembly 200, and a cable connection assembly 300. The probe is specially designed for confined spaces to solve problems such as limited space, large blind zone, and difficulty in accessing conventional probes.

[0030] Reference Figure 1 , Figure 2 and Figure 3 As shown, specifically, the housing 100 includes a main body 110 and a detection part 120 connected to each other. The volume of the detection part 120 is smaller than that of the main body 110, and the detection part 120 is connected to the end of the main body 110. The main body 110 is used as a connecting body and can be connected to components such as the detection part 120 and the cable connection assembly 300 to provide support.

[0031] Reference Figure 1 , Figure 2 and Figure 4 As shown, the detection unit 120 has an open receiving cavity 121. The ultrasonic transducer core assembly 200 is embedded in the receiving cavity 121 and connected to the detection unit 120. That is, the detection unit 120 covers the ultrasonic transducer core assembly 200. Through the structural and relative position design of the detection unit 120 and the main body 110, the water immersion ultrasonic probe for detecting the side wall end weld 700 can be used in the narrow space of the side wall end weld 700, which can effectively reduce the geometric blind zone for detecting the side wall end weld 700.

[0032] Reference Figure 1 , Figure 2 and Figure 3 As shown, the ultrasonic transducer core assembly 200 includes a matching layer 210, a piezoelectric wafer 220, and a backing block 230 stacked sequentially. The matching layer 210 is disposed on the side of the piezoelectric wafer 220 away from the main body 110. The ultrasonic transducer core assembly 200 is configured to transmit and receive ultrasonic signals to the sidewall end weld 700. One end of the cable connection assembly 300 is connected to the ultrasonic transducer core assembly 200 and embedded in the main body 110, and the other end is configured to be connected to the analysis device 400.

[0033] Reference Figure 1 , Figure 2 and Figure 3 As shown, the ultrasonic transducer core assembly 200 is used to transmit and receive ultrasonic signals to the sidewall end weld 700. Utilizing the ultrasonic echo principle, it performs non-destructive testing on the workpiece 800 via water immersion coupling. One end of the cable connection assembly 300 is connected to the ultrasonic transducer core assembly 200, and the other end is configured to connect to the analysis device 400. The ultrasonic transducer core assembly 200 can transmit the received ultrasonic signals to the analysis device 400. The analysis device 400 obtains relevant information about defects in the sidewall end weld 700 through the signal characteristics of the reflected waves, thereby improving the detection effect of the sidewall end weld 700.

[0034] Reference Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of the present invention, a water immersion ultrasonic probe for detecting the end weld 700 of the sidewall is provided. Utilizing the principle of ultrasonic echo, it performs non-destructive testing of the workpiece 800 through water immersion coupling. By scanning and covering the sidewall and root of the end weld 700, it can provide the defect depth, length, and distance from the fusion line. The ultrasonic imaging system can accurately locate the defect position and determine the defect's shape, size, orientation, distribution, and inclusions. Non-conforming points can be marked in real time, which is effective, reliable, and ensures safety.

[0035] Reference Figure 1 , Figure 2 and Figure 3 As shown, the ultrasonic transducer core assembly 200 is an integration of the matching layer 210, the piezoelectric crystal 220, and the backing block 230. It is the core component of the entire water immersion ultrasonic probe for detecting the weld seam at the end of the sidewall 700. The ultrasonic transducer core assembly 200 is both an "electroacoustic converter" and a "signal shaping filter". Its material, thickness, damping, and the design of the matching layer 210 directly determine the center frequency, bandwidth, sensitivity, pulse length, and imaging resolution of the water immersion ultrasonic probe for detecting the weld seam at the end of the sidewall 700, and play a decisive role in the performance of the water immersion ultrasonic probe for detecting the weld seam at the end of the sidewall 700.

[0036] Reference Figure 1 , Figure 2 and Figure 3 As shown, the housing 100 includes a main body 110 and a detection part 120, which undertakes four major functions: electrical, acoustic, mechanical and environmental. It is the basis for the long-term stable operation of the water immersion ultrasonic probe that detects the weld seam 700 at the end of the side wall.

[0037] Reference Figure 1 , Figure 2 and Figure 4 As shown, it can be understood that the main body 110 and the detection unit 120 are arranged at an angle, so that the ultrasonic transducer core assembly 200 connected to the detection unit 120 can be designed with a customized deflection angle for the orientation of the weld seam 700 at the end of the detection sidewall, so as to achieve full coverage of the detection of the weld seam 700 area by the angle deflection of the ultrasonic beam. (Refer to...) Figure 4 As shown, Angle represents the angle between the main body 110 and the detection unit 120.

[0038] Reference Figure 1 , Figure 2 and Figure 4 As shown, specifically, the length direction of the main body 110 is perpendicular to the opening direction of the receiving cavity 121 of the detection part 120, that is, the Angle value is 90 degrees, which can effectively realize the deflection of the ultrasonic beam and solve the problem of weak reflection of the detection echo.

[0039] Reference Figure 1 , Figure 2 and Figure 4 As shown, it can be understood that the piezoelectric wafer 220 has a self-focusing curvature. (Refer to...) Figure 4 As shown, R is the self-focusing curvature of the piezoelectric wafer 220.

[0040] Reference Figure 1 , Figure 2 and Figure 5 As shown, specifically, the piezoelectric crystal 220 can be one or more combinations of self-focusing linear array crystals and self-focusing area array crystals to improve detection sensitivity and effectively solve the problem of weak reflection of detection echo. Ultrasonic detection integrates the self-focusing piezoelectric crystal 220 into the ultrasonic transducer core assembly 200, thereby easily realizing water immersion detection of circumferential and axial defects of the side wall end weld 700 of the workpiece 800.

[0041] It should be understood that in some other embodiments, the piezoelectric chip 220 is one or more combinations of linear array chips, area array chips, self-focusing linear array chips, and self-focusing area array chips.

[0042] Reference Figure 1 , Figure 2 and Figure 5 As shown, Figure 5 In the diagram, 'a' represents a linear array chip, 'b' represents a planar array chip, 'c' represents a self-focusing linear array chip, and 'd' represents a self-focusing planar array chip.

[0043] Understandably, in this embodiment, the receiving cavity 121 is open in the first direction, and the dimension of the detection unit 120 along the second direction is the sum of the dimension of the ultrasonic transducer core assembly 200 along the second direction and a preset dimension. The second direction is perpendicular to the first direction, and the preset dimension is 0.6mm-1mm. (Refer to...) Figure 1 As shown, the X direction is the first direction, and the Y direction is the second direction.

[0044] Reference Figure 3 As shown, Figure 3 In the diagram, L indicates the dimension of the detection section 120 along the second direction, and A indicates the dimension of the ultrasonic transducer core assembly 200 along the second direction. The preset dimensions can be 0.6 mm to 1 mm. This means that the wall of the detection section 120 of the water immersion ultrasonic probe, which detects the weld seam 700 at the end of the sidewall, covering the ultrasonic transducer core assembly 200, is relatively thin. This minimizes the dimension of the detection section 120 along the main axis of the piezoelectric crystal 220 of the ultrasonic transducer core assembly 200, effectively reducing the space occupied by the detection section 120. During detection, the piezoelectric crystal 220 can be positioned as close as possible to the sidewall of the workpiece 800, achieving sound beam coverage of the weld seam 700 at the end of the sidewall, effectively solving the problem of detection geometric blind spots.

[0045] Reference Figure 1 , Figure 3 and Figure 5 As shown, the water immersion ultrasonic probe for detecting sidewall end welds 700 integrates a self-focusing piezoelectric crystal 220 and a near-wall detection section 120 structure through the ultrasonic transducer core assembly 200, thereby easily realizing water immersion detection of circumferential and axial defects in the sidewall end welds 700 of the workpiece.

[0046] Reference Figure 1 , Figure 3 and Figure 4 As shown, it can be understood that the detection unit 120 has a first wall and a second wall disposed on opposite sides of the ultrasonic transducer core assembly 200, the first wall and the second wall are arranged along a second direction, and the thickness of the first wall and the second wall is 0.3mm-0.5mm.

[0047] Reference Figure 1 , Figure 3 and Figure 4 As shown, specifically, if the preset size is 1mm, then the thickness of both the first wall and the second wall is 0.5mm.

[0048] Reference Figure 1 , Figure 3 and Figure 4 As shown, the detection unit 120 and the ultrasonic transducer core assembly 200 are designed close to the wall, so that the shape of the water immersion ultrasonic probe for detecting the weld seam 700 at the end of the side wall is designed to be narrow and irregular for the working conditions of the workpiece 800. The external automated clamping detection system can stably clamp the workpiece 800, and can realize the detection covering the area of ​​the weld seam 700 at the end of the side wall.

[0049] Reference Figure 6 , Figure 7 and Figure 8 As shown, it is understandable that, considering that on-site testing can only be carried out on one side, it is necessary to supplement with climbing wave and high-frequency short-lead-edge probes, double-sided scanning or local grooving verification to achieve an acceptable detection rate within the specification framework, increasing the re-inspection cost by 30-50%. The water immersion ultrasonic probe for detecting the end weld 700 of the sidewall provided in this embodiment of the invention also includes a connecting frame 500.

[0050] Reference Figure 6 , Figure 7 and Figure 8 As shown, the housing 100, the ultrasonic transducer core assembly 200, and the cable connection assembly 300 together constitute a probe head. Two probe heads are provided and connected side by side to the connecting frame 500. The ultrasonic transducer core assemblies 200 of the two probe heads are arranged facing each other. A detection space 610 is constructed between the ultrasonic transducer core assemblies 200 of the two probe heads to accommodate the side wall end weld 700. The two probe heads can detect the opposite sides of the side wall end weld 700. The double-sided scanning is fast and efficient, improving the detection rate and detection efficiency.

[0051] Reference Figure 6 , Figure 7 and Figure 8 As shown, during the inspection process, the workpiece 800 can be placed in the inspection space 610, and the inspection unit 120 is set close to the side wall of the workpiece 800, so that the two probes are located on the opposite sides of the weld 700 at the end of the side wall. That is, the water immersion ultrasonic probe for inspecting the weld 700 at the end of the side wall can simultaneously inspect both sides of the weld 700 at the end of the side wall, which can effectively improve the inspection efficiency and reduce the re-inspection cost by 30% to 50%.

[0052] Reference Figure 8 As shown, the sound beams emitted by the two probes can cover the side wall end weld 700 in the coverage area 620, thereby enabling simultaneous detection of both sides of the side wall end weld 700, which can effectively improve detection efficiency.

[0053] Reference Figure 6 , Figure 7 and Figure 8As shown, the cable connection assembly 300 comprises a flexible circuit board 310, a sheathed connector 320, a multi-core coaxial cable 330, a connector 340, and a housing 350. The flexible circuit board 310 is connected to the multi-core coaxial cable 330 and the ultrasonic transducer core assembly 200. The sheathed connector 320 is connected to the junction of the multi-core coaxial cable 330 and the main body 110 to improve the connection stability between the multi-core coaxial cable 330 and the main body 110. The end of the multi-core coaxial cable 330 away from the main body 110 can be connected to the connector 340, which can be connected to an external analysis device 400. The housing 350 is connected to the connector 340 to protect the connector 340.

[0054] The cable connection assembly 300 is a core component that integrates a signal highway, a power supply bus, a mechanical quick-release mechanism, and a life fuse. It can transmit the high-impedance microvolt signal from the ultrasonic transducer core assembly 200 to the analysis equipment 400 without loss, while also withstanding external interference such as pulse voltages up to about 400 V, repeated plugging and unplugging, waterproofing, dustproofing, and mechanical vibration.

[0055] Reference Figure 6 , Figure 7 and Figure 8 As shown, the housing 100 can be made of materials such as stainless steel 304 or stainless steel 316 to ensure that it will not easily rust or corrode under harsh environments. The general indicator is a salt spray test of more than 48 hours.

[0056] Reference Figure 6 , Figure 7 and Figure 8 As shown, it can be understood that when using the water immersion ultrasonic probe for detecting the sidewall end weld 700, the user can couple the workpiece 800 and the sidewall end weld 700 through water immersion coupling. By adjusting the appropriate water distance and matching the self-focusing piezoelectric crystal 220, the problem of insufficient near-surface resolution of the sidewall end weld 700 is effectively solved. The ultrasonic signals emitted and received by the ultrasonic transducer core component 200 are transmitted to the analysis device 400 through the cable connection component 300. The analysis device 400 can be a flaw detector. Based on the signal characteristics of the reflected wave, the flaw detector displays the scanned waveform image on the screen in real time, showing the shape, position, orientation, and distribution of internal defects such as cracks, holes, and bubbles in the sidewall end weld 700 of the workpiece 800.

[0057] Reference Figure 6 , Figure 7 and Figure 8As shown, the water immersion ultrasonic probe for detecting the side wall end weld 700 provided in this embodiment of the invention can integrate the housing 100, the ultrasonic transducer core assembly 200 and the cable connection assembly 300 into one unit, and can realize real-time detection of the inner wall and internal defects of the ultrasonic transducer core assembly 200.

[0058] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that, for the workpiece 800 being a water-cooled plate, this embodiment proposes specific implementation parameters for a water immersion ultrasonic probe for detecting the end weld 700 of the sidewall: Center frequency: 18MHz; Array configuration: self-focusing linear array arrangement; Number of main axis array elements: 64; Center-to-center distance between adjacent array elements on the main axis: 0.2mm; Element secondary axis length: 6mm; Probe housing material: SUS316; Cable 330 outer sheath material: PU; Cable 330 length: 2M.

[0059] Reference Figure 1 , Figure 2 and Figure 3 As shown in the figure, the water immersion ultrasonic probe for detecting the side wall end weld 700 has a significant detection effect. It was found that the inner wall and internal defects of the side wall end weld 700 of the workpiece 800 were obvious, the images were clear, the defects were displayed intuitively, and the operation was convenient and simple.

[0060] Reference Figure 1 , Figure 2 and Figure 9 As shown, one embodiment of the detection method of the present invention is applied to a water immersion ultrasonic probe for detecting the end weld 700 of the sidewall as shown in any of the above embodiments. The detection method includes the following steps: Step S100: Position and fix the workpiece 800 to be inspected, the workpiece 800 having a side wall end weld 700; Step S200: Determine the parameters of the ultrasonic transducer core assembly 200 and the relative positional relationship between the main body 110 and the detection unit 120 based on the side wall end weld 700. In step S300, both the side wall end weld 700 and the detection part 120 are immersed in the coupling liquid, and the distance between the ultrasonic transducer core assembly 200 and the side wall end weld 700 is adjusted to a preset distance. In step S400, the ultrasonic transducer core assembly 200 emits ultrasonic signals to the side wall end weld 700 and transmits the received ultrasonic signals to the analysis device 400 for analysis via the cable connection assembly 300.

[0061] Reference Figure 1 , Figure 2 and Figure 9 As shown, this detection method determines the parameters of the ultrasonic transducer core assembly 200 based on the position and shape of the sidewall end weld 700 of the workpiece 800. For example, it adjusts the center frequency, array configuration, number of main axis elements, and center spacing between adjacent main axis elements of the ultrasonic transducer core assembly 200. This water immersion ultrasonic probe for detecting the sidewall end weld 700 can determine the relative positional relationship between the main body 110 and the detection unit 120 based on the sidewall end weld 700 of the workpiece 800. This allows the water immersion ultrasonic probe to be used in confined spaces around the sidewall end weld 700, effectively reducing the geometric blind zone for detecting the sidewall end weld 700, and making the transmitted and received echo energies more parallel, thereby improving the detection effect.

[0062] Reference Figure 1 , Figure 2 and Figure 9 As shown, this detection method can then use a water-immersion ultrasonic probe to couple the workpiece 800 and the sidewall end weld 700 through water immersion coupling. By adjusting the appropriate water distance and matching the self-focusing piezoelectric crystal 220, the problem of insufficient near-surface resolution of the sidewall end weld 700 can be effectively solved. The ultrasonic signals emitted and received by the ultrasonic transducer core component 200 are transmitted to the analysis device 400 through the cable connection component 300. The analysis device 400 can be a flaw detector. Based on the signal characteristics of the reflected wave, the flaw detector displays the scanned waveform image on the screen in real time, showing the shape, position, orientation, and distribution of internal defects such as cracks, holes, and bubbles in the sidewall end weld 700 of the workpiece 800.

[0063] Reference Figure 1 , Figure 2 and Figure 10 As shown, it can be understood that the water immersion ultrasonic probe for detecting the weld seam 700 at the end of the side wall also includes a connecting frame 500, a housing 100, an ultrasonic transducer core assembly 200, and a cable connection assembly 300, which together constitute a probe head, and two probe heads are provided.

[0064] The detection method, in step S300, adjusts the distance between the ultrasonic transducer core assembly 200 and the sidewall end weld 700 to a preset distance, and also includes the following steps: Step S310: Connect the two probes side by side to the connecting frame 500, with the ultrasonic transducer core components 200 of the two probes facing each other. In step S320, the distance between the two ultrasonic transducer core components 200 is adjusted so that a detection space 610 is constructed between the ultrasonic transducer core components 200 of the two probes to accommodate the sidewall end weld 700. The two probes are configured to detect the two opposite sides of the sidewall end weld 700.

[0065] Reference Figure 1 , Figure 2 and Figure 10 As shown, during the inspection process, the workpiece 800 can be placed in the inspection space 610, and the inspection part 120 is set close to the side wall so that the two probes are located on the opposite sides of the weld 700 at the end of the side wall. That is, the water immersion ultrasonic probe for inspecting the weld 700 at the end of the side wall can simultaneously inspect both sides of the weld 700 at the end of the side wall, which can effectively improve the inspection efficiency and reduce the re-inspection cost by 30% to 50%.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A water immersion ultrasonic probe for detecting weld seams at the end of sidewalls, characterized in that, include: The housing (100) includes a main body (110) and a detection part (120) connected to each other, the detection part (120) having an open receiving cavity (121); An ultrasonic transducer core assembly (200) is embedded in the receiving cavity (121) and connected to the detection unit (120). The ultrasonic transducer core assembly (200) includes a matching layer (210), a piezoelectric wafer (220), and a backing block (230) stacked in sequence. The matching layer (210) is located on the side of the piezoelectric wafer (220) away from the main body (110). The ultrasonic transducer core assembly (200) is configured to transmit and receive ultrasonic signals to the sidewall end weld (700). A cable connection assembly (300) has one end connected to the ultrasonic transducer core assembly (200) and embedded in the main body (110), and the other end configured for connection to the analysis device (400).

2. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 1, characterized in that, The main body (110) and the detection part (120) are arranged at an angle.

3. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 2, characterized in that, The length direction of the main body (110) is perpendicular to the opening direction of the receiving cavity (121) of the detection part (120).

4. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 1, characterized in that, The piezoelectric chip (220) is one or more of the following: linear array chip, area array chip, self-focusing linear array chip, and self-focusing area array chip.

5. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 4, characterized in that, The piezoelectric wafer (220) has a self-focusing curvature.

6. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 1, characterized in that, The receiving cavity (121) is open in the first direction, and the size of the detection part (120) in the second direction is the sum of the size of the ultrasonic transducer core assembly (200) in the second direction and a preset size. The second direction is perpendicular to the first direction, and the preset size is 0.6mm-1mm.

7. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 6, characterized in that, The detection unit (120) has a first wall and a second wall disposed on opposite sides of the ultrasonic transducer core assembly (200), and the thickness of the first wall and the second wall is 0.3mm-0.5mm. And / or, the preset size is 1mm.

8. The water immersion ultrasonic probe for detecting sidewall end welds according to claim 1, characterized in that, It also includes a connecting frame (500). The housing (100), the ultrasonic transducer core assembly (200), and the cable connection assembly (300) together constitute a probe head. Two probe heads are provided and connected side by side to the connecting frame (500). The ultrasonic transducer core assemblies (200) of the two probe heads are arranged facing each other. A detection space (610) is constructed between the ultrasonic transducer core assemblies (200) of the two probe heads to accommodate the side wall end weld (700). The two probe heads can detect the two opposite sides of the side wall end weld (700).

9. A detection method, characterized in that, The water immersion ultrasonic probe for detecting sidewall end welds as described in any one of claims 1 to 8 is used; The detection method includes: Position and fix the workpiece (800) to be tested, the workpiece (800) having a side wall end weld (700); The parameters of the ultrasonic transducer core assembly (200) and the relative positional relationship between the main body (110) and the detection part (120) are determined based on the side wall end weld (700). Immerse both the sidewall end weld (700) and the detection part (120) in the coupling liquid, and adjust the distance between the ultrasonic transducer core assembly (200) and the sidewall end weld (700) to a preset distance; The ultrasonic transducer core assembly (200) emits ultrasonic signals to the sidewall end weld (700) and transmits the received ultrasonic signals to the analysis device (400) for analysis via the cable connection assembly (300).

10. The detection method according to claim 9, characterized in that, The water immersion ultrasonic probe for detecting the weld seam at the end of the side wall also includes a connecting frame (500). The housing (100), the ultrasonic transducer core assembly (200), and the cable connection assembly (300) together constitute a probe head, and two probe heads are provided. Adjusting the distance between the ultrasonic transducer core assembly (200) and the sidewall end weld (700) to a preset distance further includes: The two probes are connected side by side to the connecting frame (500), so that the ultrasonic transducer core assemblies (200) of the two probes are arranged facing each other; The spacing between the two ultrasonic transducer core assemblies (200) is adjusted so that a detection space (610) is constructed between the ultrasonic transducer core assemblies (200) of the two probes to accommodate the sidewall end weld (700), and the two probes are configured to detect the opposite sides of the sidewall end weld (700).

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