An eddy current testing device for saddle welds

Abstract

The application discloses a kind of vortex detection devices for saddle weld, including: the support frame rotating around workpiece, swing assembly and the detection component for detecting saddle weld, at least one set of swing assembly is installed to support frame, and detection component is installed to swing assembly;Swing assembly includes: first swing piece and second swing piece, first swing piece is arranged on support frame along curve swing, and second swing piece is arranged on first swing piece along curve swing, and the swing curve of first swing piece and second swing piece is staggered with each other, detection component is installed on first swing piece, and detection component is elastically pressed on workpiece by the swing of first swing piece and second swing piece.Further reduce the operation difficulty, with the detection component of vortex detection head can be moved along saddle-shaped weld at the same time more closely, improve the stability of vortex coupling and the quality of detection signal, further improve the accuracy of detection data.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology, and more particularly to an eddy current testing device for saddle surface welds. Background Technology

[0002] In the field of eddy current non-destructive testing of saddle-shaped weld arrays for nuclear reactor pressure vessel top cover penetrations, there is a prior art device that uses eddy currents to inspect welds. This device uses a detection head that emits divergent eddy currents to inspect the welds. During the inspection process, the eddy current detection head needs to be in close contact with the weld.

[0003] However, due to the limited adaptive fitting capability of the eddy current detection head, it is relatively troublesome to operate when inspecting saddle-shaped welds. The eddy current detection head cannot fit tightly with the saddle-shaped weld, which indirectly affects the stability of eddy current coupling and the quality of the detection signal, resulting in deviations in the weld detection data. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an eddy current detection device for saddle surface welds and a method for adding ammonia thereto.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: An eddy current detection device for saddle surface welds is constructed, comprising: a support frame rotating around a workpiece, a swing assembly, and a detection assembly for detecting the saddle surface welds. At least one set of the swing assembly is mounted on the support frame, and the detection assembly is mounted on the swing assembly. The swing assembly includes: a first swing member and a second swing member. The first swing member swings along a curve on the support frame, and the second swing member swings along a curve on the first swing member. The swing curves of the first and second swing members intersect each other. The detection assembly is mounted on the first swing member. The swing of the first and second swing members elastically presses the detection assembly against the workpiece, so that the detection assembly fits uniformly and without gaps at the saddle surface weld for detection.

[0006] Furthermore, the first swinging component includes: a first swing block, a first elastic element, and a first mating element. The first swing block is swing-mounted onto the support frame via the first mating element, and the first elastic element is connected between the first swing block and the support frame.

[0007] Furthermore, the second swinging member includes: a second swing block, a second elastic member, and a second mating member. The second swing block is oscillatingly mounted onto the first swing block via the second mating member, and the second elastic member is connected between the second swing block and the first swing block.

[0008] Furthermore, the first mating component includes symmetrically arranged limiting protrusions on the first swing block and an arc groove arranged on the support frame, wherein the plurality of limiting protrusions are slidably connected to the arc groove for swinging.

[0009] Furthermore, the first mating component includes symmetrically arranged limiting protrusions on the support frame and an arc groove arranged on the first swing block, wherein the plurality of limiting protrusions are slidably connected to the arc groove for swinging; or / and the second mating component has the same structure as the first mating component; or / and the swing curves of the first swing component and the second swing component are perpendicular to each other.

[0010] Furthermore, the detection component includes a bonding component and a detection component, wherein the bonding component is mounted on the second swing block and in contact with the workpiece, and the detection component is mounted on the bonding component.

[0011] Furthermore, the bonding component includes: a mounting plate and rolling elements, the mounting plate being mounted on the second swing block, and a plurality of rolling elements being mounted on the mounting plate, the plurality of rolling elements being distributed in a polygonal, circular, or arc shape.

[0012] Furthermore, the detection element includes a detection head and an elastic pad, wherein the detection head is mounted on the mounting plate via the elastic pad.

[0013] Furthermore, the support frame includes: a lateral movement component, a longitudinal movement component, and a support base. The support base is mounted on the rotating frame, the lateral movement component is mounted on the support base and moves radially along the workpiece, and the longitudinal movement component is mounted on the lateral movement component and moves axially along the workpiece.

[0014] Furthermore, the detection component also includes a camera mounted on the longitudinally moving component.

[0015] The implementation of this invention has the following beneficial effects: This application utilizes a support frame rotating around a workpiece, a swing assembly, and a detection assembly for inspecting saddle-face welds. At least one set of swing assemblies is mounted on the support frame, and the detection assembly is mounted on the swing assemblies. The swing assembly includes a first swing member and a second swing member. The first swing member swings along a curve on the support frame, and the second swing member swings along a curve on the first swing member. The swing curves of the first and second swing members intersect each other. The detection assembly is mounted on the first swing member. The swinging motion of the first and second swing members elastically presses the detection assembly against the workpiece, ensuring a gapless and uniform fit of the detection assembly. The detection is performed at the saddle-shaped weld. The oscillation curves of the first and second oscillating components intersect, allowing the oscillating assembly to drive the detection assembly to achieve two degrees of freedom of contact on the saddle-shaped weld. The rotating support frame, through the oscillating assembly, enables the detection assembly to move along the saddle-shaped weld while simultaneously ensuring a tighter fit between the oscillating detection assembly and the weld, thus reducing operational difficulty. The detection assembly with the eddy current detection head can move along the saddle-shaped weld while maintaining a tighter fit, improving the stability of eddy current coupling and the quality of the detection signal, thereby enhancing the accuracy of the detection data. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] In the attached image: Figure 1 This is a schematic diagram of the installation position of an eddy current detection device for saddle surface welds provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an eddy current detection device for saddle surface welds provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the swing component and the detection component provided in the embodiment of the present invention; Figure 4 This is an exploded view of the swing assembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the rolling element and the detection element provided in the embodiment of the present invention; Figure 6 This is a schematic diagram of the support frame provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the lateral movement component and the longitudinal movement component provided in an embodiment of the present invention; Figure 8This is a schematic diagram of the camera installation position provided in an embodiment of the present invention.

[0018] Explanation of markings in the diagram Workpiece 1, support frame 2, transverse movement assembly 21, longitudinal movement assembly 22, support base 23, swing assembly 3, first swing component 31, first swing block 311, first elastic component 312, first mating component 313, limiting protrusion 3131, arc groove 3132, second swing component 32, second swing block 321, second elastic component 322, second mating component 323, detection assembly 4, bonding component 41, mounting plate 411, rolling component 412, connecting sleeve 4121, ball bearing 4122, detection component 42, detection head 421, elastic pad 422, camera 43. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0022] Please see Figures 1-4 According to the first embodiment of the present invention, an eddy current detection device for saddle surface welds includes: a support frame 2 rotating around a workpiece 1, an oscillating assembly 3, and a detection assembly 4 for detecting saddle surface welds. At least one set of oscillating assemblies 3 is mounted on the support frame 2, and the detection assembly 4 is mounted on the oscillating assembly 3. The oscillating assembly 3 includes: a first oscillating element 31 and a second oscillating element 32. The first oscillating element 31 is oscillating along a curve on the support frame 2, and the second oscillating element 32 is oscillating along a curve on the first oscillating element 31. The oscillation curves of the first oscillating element 31 and the second oscillating element 32 intersect each other. The detection assembly 4 is mounted on the first oscillating element 31. The oscillation of the first oscillating element 31 and the second oscillating element 32 elastically presses the detection assembly 4 onto the workpiece 1, so that the detection assembly 4 fits evenly and without gaps at the saddle surface weld for detection.

[0023] This application utilizes a support frame 2 that rotates around a workpiece 1, a swing assembly 3, and a detection assembly 4 for inspecting the saddle-shaped weld seam. At least one set of swing assemblies 3 is installed on the support frame 2, and the detection assembly 4 is installed on the swing assembly 3. The support frame 2 surrounds the cylindrical workpiece 1 of the saddle-shaped welded workpiece. In this way, the support frame 2 can drive the swing assembly 3 and the detection assembly 4 to perform circumferential inspection of the saddle-shaped weld seam around the cylindrical workpiece 1, so that the support frame 2 can rotate concentrically around the cylindrical workpiece 1. During this rotation, the detection assembly 4 can move along the saddle-shaped weld seam, thereby reducing the difficulty of operation and making the operation more labor-saving and convenient.

[0024] The swing assembly 3 includes a first swing member 31 and a second swing member 32. The first swing member 31 is oscillating along a curve on the support frame 2, and the second swing member 32 is oscillating along a curve on the first swing member 31. The swing curves of the first swing member 31 and the second swing member 32 intersect each other. The detection assembly 4 is mounted on the first swing member 31. The swing of the first swing member 31 and the second swing member 32 elastically presses the detection assembly 4 onto the workpiece 1, so that the detection assembly 4 fits evenly and without gaps at the saddle weld. The detection assembly 4 is a detection head with diverging eddy current function in the prior art. After the first swing member 31 is oscillating along a curve on the support frame 2, the first swing member 31 can drive the detection assembly 4 to swing left and right or back and forth on the first plane, thereby increasing the degree of freedom of the detection assembly 4 when detecting the saddle weld. After the second swing component 32 is set on the first swing component 31 along the curve, it enables the second swing component 32 to drive the detection component 4 to swing back and forth or left and right on the second plane, which further increases the other degree of freedom of the detection component 4 when detecting the saddle-shaped weld. By intersecting the swing curves of the first swing component 31 and the second swing component 32, the swing component 3 can drive the detection component 4 to complete the two degrees of freedom of contact on the saddle-shaped weld. The rotating support frame 2 can make the detection component 4 move along the saddle-shaped weld while the swing component 3 makes the swing detection component 4 fit more tightly with the saddle-shaped weld, thereby reducing the difficulty of operation. The detection component 4 with the eddy current detection head can move along the saddle-shaped weld while fitting more tightly, which improves the stability of eddy current coupling and the quality of detection signal, thereby improving the accuracy of detection data.

[0025] The first swinging component 31 is oscillating along a curve on the support frame 2. The first swinging component 31 can swing back and forth or left and right on the support frame 2 in an arc, so that the first swinging component 31 can move in an arc on the support frame 2 as a whole. When the support frame 2 and the swinging component 3 press the detection component 4 against the saddle-shaped weld, the arc curve swing of the first swinging component 31 can tightly fasten the detection component 4 to the saddle-shaped weld, and detect the saddle-shaped weld. The second swing member 32 is oscillating along a curve on the first swing member 31. The second swing member 32 can swing left and right or back and forth in an arc on the first swing member 31, so that the second swing member 32 can move in an arc on the first swing member 31 as a whole. When the support frame 2 and the swing assembly 3 press the detection assembly 4 onto the saddle-shaped weld, the swing curves of the first swing member 31 and the second swing member 32 intersect each other, which can tightly fasten the detection assembly 4 onto the saddle-shaped weld, and detect the saddle-shaped weld, thereby improving the accuracy and stability of the detection data.

[0026] Specifically, the first swinging component 31 is set to swing along a curve on the support frame 2. This means that the first swinging component 31 swings back and forth along a curve on the support frame 2. The curved swinging of the first swinging component 31 is achieved through the curved limiting cooperation between the first swinging component 31 and the support frame 2. The first swinging component 31 is limited to the support frame 2 by a curved limiting groove with a certain path, so that the first swinging component 31 can only swing back and forth within the limiting space of the support frame 2. The curved swinging can be an arc curve. By using the curved swinging between the first swinging component 31 and the support frame 2, the first swinging component 31 can adaptively swing on the support frame 2 according to the saddle-shaped weld, thereby improving the fit between the detection component 4 and the saddle-shaped weld and improving the detection effect.

[0027] Similarly, the second swinging member 32 swinging along a curve on the first swinging member 31 specifically means that the second swinging member 32 swings back and forth along a curve on the first swinging member 31. This curved swinging of the second swinging member 32 is achieved through the curved limiting cooperation between the second swinging member 32 and the first swinging member 31. Using a curved limiting groove with a certain path, the second swinging member 32 is limited to the first swinging member 31, so that the second swinging member 32 can only swing back and forth within the limiting space of the first swinging member 31. Here, the curved swing can be an arc curve. By using the curved swinging between the second swinging member 32 and the first swinging member 31, the overall cooperation between the second swinging member 32 and the first swinging member 31 allows the second swinging member 32 and the first swinging member 31 to adaptively swing on the support frame 2 according to the saddle-shaped weld, thereby further improving the fit between the detection component 4 and the saddle-shaped weld, and thus improving the accuracy and stability of the detection data.

[0028] When the detection component 4 is pressed against the saddle-shaped weld by the support frame 2 and the swing assembly 3, the swing curves of the first swing component 31 and the second swing component 32 are staggered, which allows the second swing component 32 to carry the detection component 4 to fit against the saddle-shaped weld. When the support frame 2 drives the swing assembly 3 and the detection component 4 to rotate around the cylindrical workpiece 1, the two degrees of freedom for fitting provided by the swing assembly 3 to the detection component 4 will cause the detection component 4 to move along the saddle-shaped weld while adaptively changing its posture according to the curvature change of the saddle-shaped weld, so that the detection component 4 can adaptively fit against the saddle-shaped weld, accurately detect the saddle-shaped weld, thereby reducing the difficulty of operation, improving the efficiency of detection, and improving the accuracy of detection data.

[0029] Please see Figures 1-4 In some embodiments, the first swing member 31 includes: a first swing block 311, a first elastic member 312 and a first mating member 313. The first swing block 311 is swing-mounted onto the support frame 2 through the first mating member 313, and the first elastic member 312 is connected between the first swing block 311 and the support frame 2.

[0030] This application uses a first swing block 311 to swing onto a support frame 2 via a first mating part 313. A first elastic element 312 connects the first swing block 311 and the support frame 2. When the support frame 2 and the moving component 3 press the detection component 4 onto the saddle-shaped weld, the detection component 4 and the swing component 3 are subjected to a reverse compressive force from the surface of the saddle-shaped weld, causing the first swing block 311 to adaptively deflect relative to the support frame 2 around the first mating part 313. The first elastic element 312 generates compressive elastic deformation while the first swing block 311 swings and deflects in an arc. The first elastic element 312 continuously outputs a pushing force towards the saddle-shaped weld to the first swing block 311 using its own elastic restoring force. Together with the movement of the second swing element 32, it provides stable adaptive attitude adjustment power for the detection component 4. This can prevent the detection component 4 from losing contact with the surface of the saddle-shaped weld due to a sudden change in the curvature of the saddle-shaped weld during the detection process, effectively ensuring the stability of the eddy current detection signal and further improving the accuracy of the detection data.

[0031] The first elastic element 312 can be a tension spring, a spring sheet, or a spring rope. The first elastic element 312 will pull the first swing block 311 to the center of the support frame 2. That is, when the first swing block 311 is in a horizontal position, the first elastic element 312 is in its initial state. After the detection component 4 is pressed onto the saddle-shaped weld by the support frame 2 and the swing component 3, the first elastic element 312 will always apply a centering driving force to the first swing block 311 that is deflected by the arc, so that the first swing block 311 and the second swing element 32 can drive the detection component 4 to always fit against the saddle-shaped weld, thereby improving the accuracy of the detection data.

[0032] Please see Figures 1-4 In some embodiments, the second swing member 32 includes: a second swing block 321, a second elastic member 322, and a second mating member 323. The second swing block 321 is swing-mounted onto the first swing block 311 via the second mating member 323, and the second elastic member 322 is connected between the second swing block 321 and the first swing block 311.

[0033] Similarly, in this application, the second swing block 321 is oscillatingly mounted onto the first swing block 311 via the second mating part 323. The second elastic element 322 is connected between the second swing block 321 and the first swing block 311, enabling the second swing block 321 to drive the detection component 4 to adaptively deflect along another dimension perpendicular to the swing direction of the first swing block 311. The second elastic element 322 will always apply a rebound force to the deflected second swing block 321, ensuring that the detection probe of the detection component 4 can always fit the complex curved surface contour of the saddle-shaped weld in two staggered swing dimensions, avoiding problems such as detection signal deviation and missed detection due to insufficient fit between the detection component 4 and the weld surface, and further improving the adaptability and detection accuracy of the detection device for irregular saddle-shaped welds.

[0034] Similarly, the second elastic element 322 can be a tension spring, a spring sheet, or a spring rope. The second elastic element 322 will pull the second swing block 321 to the center of the first swing block 311. That is, when the second swing block 321 is in a horizontal position, the second elastic element 322 is in its initial state. When the second swing block 321 is deflected by the pressure of the irregular contour of the saddle-shaped weld, the second elastic element 322 will undergo elastic deformation, thereby generating a stable rebound force. This rebound force will continuously push the second swing block 321 to exert force on the side of the saddle-shaped weld, ensuring that the eddy current probe of the detection component 4 connected to the second swing block 321 is always stably attached to the surface of the saddle-shaped weld, providing a reliable guarantee for the stable output of the detection signal.

[0035] Please see Figures 1-4 In some embodiments, the first mating member 313 includes limiting protrusions 3131 symmetrically arranged on the first swing block 311 and an arc groove 3132 arranged on the support frame 2. The multiple limiting protrusions 3131 are slidably connected in the arc groove 3132 to swing.

[0036] This application utilizes a first mating component 313, which includes symmetrically arranged limiting protrusions 3131 on the first swing block 311 and an arc groove 3132 on the support frame 2. Multiple limiting protrusions 3131 are slidably connected to the arc groove 3132 for swinging. The sliding engagement of the limiting protrusions 3131 and the arc groove 3132 limits the swing trajectory of the first swing block 311, ensuring that the first swing block 311 always deflects and swings along a preset arc path. This avoids positional deviation or jamming during swinging, ensuring smooth follow-up compensation actions. The symmetrically distributed limiting protrusions 3131 and the arc groove 3132 ensure uniform force distribution on the first swing block 311 during deflection, effectively preventing wobbling and skew during swinging. This further enhances the stability of the swing assembly 3 when driving the detection assembly 4 to conform to the saddle-shaped weld, thus better ensuring the conformation effect between the eddy current probe of the detection assembly 4 and the surface of the saddle-shaped weld, providing structural support for the final detection accuracy.

[0037] The sliding engagement between the limiting protrusion 3131 and the arc groove 3132 enables the first mating component 313 to swing in an arc, allowing it to adapt to different curvature positions of the saddle-shaped weld. When the support frame 2 and the swing assembly 3 move the detection assembly 4 along the weld path, this arc sliding engagement structure can respond in real time to the reaction force of the weld surface on the eddy current probe, automatically adjusting the deflection angle of the first swing block 311. This ensures the eddy current probe maintains good contact with the weld surface without additional power-driven adjustment. Furthermore, the arc curvature of the arc groove 3132 can be pre-adapted to the conventional curvature range of the saddle-shaped weld to be inspected, further enhancing the device's adaptability to different specifications of saddle-shaped welds and expanding its applicability.

[0038] Please see Figures 1-4 In some embodiments, the first mating member 313 includes limiting protrusions 3131 symmetrically arranged on the support frame 2 and an arc groove 3132 arranged on the first swing block 311. The multiple limiting protrusions 3131 are slidably connected in the arc groove 3132 to swing.

[0039] Similarly, the first mating component 313 of this application may include symmetrically arranged limiting protrusions 3131 on the support frame 2 and arc grooves 3132 arranged on the first swing block 311. Multiple limiting protrusions 3131 are slidably connected in the arc grooves 3132 and swing, which can reduce the space occupied by the top structure of the support frame 2 and reduce the interference between the support frame 2 and the workpiece 1 during the inspection process. The first swing block 311 with arc grooves 3132 can swing in an arc according to the curvature of the saddle-shaped weld during the inspection process. In this way, the first swing block 311 with overall deflection swing will automatically avoid the workpiece 1, which can avoid collision with the workpiece 1 and affect the inspection results, improve the accuracy of the inspection, and make the spatial layout of the structure more reasonable and reliable.

[0040] This layout, where the limiting protrusion 3131 is located on the support frame 2 and the arc groove 3132 is formed in the first swing block 311, allows for easier replacement of the first swing block 311 to suit different curvature specifications of the saddle welds to be inspected. Operators only need to replace the first swing block 311 with the corresponding arc groove 3132 curvature to meet different inspection requirements, without modifying the overall structure of the support frame 2. This reduces the cost of device adjustment and maintenance, and further enhances the flexibility of the device to adapt to different inspection scenarios. In addition, the symmetrical arrangement of the limiting protrusion 3131 and the arc groove 3132 ensures the uniformity of force during the deflection process of the first swing block 311, guaranteeing the stability of the eddy current detection signal and the accuracy of the detection results.

[0041] Please see Figures 1-4 In some embodiments, the second mating member 323 has the same structure as the first mating member 313.

[0042] This application uses a second mating part 323 with the same structure as the first mating part 313. The second mating part 323 includes a limiting protrusion 3131 symmetrically arranged on the first swing block 311 and an arc groove 3132 arranged on the second swing block 321. Multiple limiting protrusions 3131 are slidably connected in the arc groove 3132. In this way, by using the multiple angle swings of the first swing part 31 and the second swing part 32, the detection component 4 can be tightly attached to the saddle-shaped weld during the detection process, thereby improving the accuracy of the detection data.

[0043] Among them, the limiting protrusion 3131 can be a roller. By rolling and sliding the roller in the arc groove 3132, the sliding friction can be effectively converted into rolling friction, which greatly reduces the motion resistance encountered by the first swing block 311 and the second swing block 321 during the swing process. This not only reduces the wear between the mating surfaces and extends the service life of the components, but also improves the smoothness of the swing process, avoids jamming and shaking that affect the fit between the detection component 4 and the saddle-shaped weld, and further ensures the stability of the detection process and the reliability of the detection results.

[0044] The second mating component 323 has the same structure as the first mating component 313. This not only simplifies the processing steps of the device components and reduces the types of non-standard parts, thus lowering the production cost of the device, but also facilitates later maintenance and replacement of parts, further reducing the maintenance difficulty and cost of the device. The unified structural design ensures that the second swing block 321 achieves the same arc deflection effect as the first swing block 311, effectively guaranteeing the stability and accuracy of the overall detection results.

[0045] This application achieves this by having the swing curves of the first swing member 31 and the second swing member 32 perpendicular to each other, so that the first swing member 31 and the second swing member 32 can drive the detection component 4 to swing on the cross plane. This allows the detection component 4 to obtain two orthogonal swing degrees of freedom, enabling it to adaptively match the continuous curvature changes of the saddle-shaped weld surface and maintain the fit between the eddy current detection probe of the detection component 4 and the surface of the weld to be detected. This improves the efficiency and accuracy of the detection, eliminates the need for manual segmented adjustment of the detection position, and can adapt to the weld detection needs of saddle-shaped workpieces 1 of different specifications, further enhancing the versatility and detection accuracy of the eddy current detection device.

[0046] Please see Figures 1-5 In some embodiments, the detection component 4 includes a bonding member 41 and a detection member 42. The bonding member 41 is mounted on the second swing block 321 and contacts the workpiece 1. The detection member 42 is mounted on the bonding member 41.

[0047] This application utilizes a bonding component 41 and a detection component 42. The bonding component 41 is mounted on the second swing block 321 and contacts the workpiece 1. The detection component 42 is mounted on the bonding component 41 and is an eddy current detection probe. The bonding component 41 can be a steel structure. The bonding component 41 drives the detection component 42 to connect with the second swing block 321. The support frame 2 and the swing assembly 3 press the bonding component 41 onto the workpiece 1. The bonding component 41 is located between the two welded workpieces 1, and the bonding component 41 carries the detection component 42 between the bonding component 41 and the workpiece 1. Between the saddle-shaped welds, the inspection piece 42 can fit against the saddle-shaped weld. The fitting piece 41 supports a space for protecting the inspection piece 42 through the included angle between the two welded workpieces 1. The top pressure applied to the inspection piece 4 by the support frame 2 and the swing assembly 3 is intercepted by the fitting piece 41 onto the workpiece 1. In this way, although the inspection piece 42 is in contact with the saddle-shaped weld during the inspection process, no excessive pressure is applied to the inspection piece 42, thus providing a certain degree of protection and extending the service life of the inspection piece 42. The swing assembly 3 moves and swings the fitting piece 41 along the arc included angle between the two welded workpieces 1 during the inspection process, making the fitting piece 41 fit tightly against the workpiece 1. In turn, the fitting piece 41 drives the inspection piece 42 to fit tightly against the saddle-shaped weld, improving the accuracy and stability of the inspection.

[0048] Please see Figures 1-5 In some embodiments, the fitting member 41 includes a mounting plate 411 and rolling members 412. The mounting plate 411 is mounted on the second swing block 321, and a plurality of rolling members 412 are mounted on the mounting plate 411. The plurality of rolling members 412 are distributed in a polygonal, circular or arc shape.

[0049] This application utilizes a mounting plate 411 and rolling elements 412. The mounting plate 411 is mounted on the second swing block 321, and multiple rolling elements 412 are mounted on the mounting plate 411. By utilizing the contact between the rolling elements 412 and the workpiece 1, when the support frame 2 and the swing assembly 3 press the bonding element 41 onto the workpiece 1, the rolling elements 412 will contact the surface of the workpiece 1. During the inspection process, the rolling elements 412 can convert sliding friction into rolling friction, which can reduce the wear on the workpiece 1 and the bonding element 41. At the same time, it reduces the resistance encountered when the swing assembly 3 drives the bonding element 41 to move, making the movement of the bonding element 41 smoother and less prone to jamming. This ensures that the bonding element 41 drives the inspection element 42 to always stably fit against the saddle-shaped weld, and the bonding element 42 will not shift or jump due to excessive frictional resistance, further improving the stability of the inspection process and the accuracy of the inspection results. In addition, the mounting plate 411 provides space for the installation of the test piece 42, which facilitates installation. The multiple rolling elements 412 can better support the mounting plate 411, which not only ensures the fit between the test piece 42 and the weld, but also further disperses the top pressure force and extends the overall service life of the fitting piece 41.

[0050] Multiple rolling elements 412 are distributed in polygonal, circular, or arc shapes, and can be arranged around the detection end of the detection piece 42. This arrangement can adapt to the curvature of the surface at different positions of the saddle-shaped weld, ensuring that at least two rolling elements 412 are in stable contact with the surface of the workpiece 1 in any posture. This prevents the mounting plate 411 from tilting or shaking, and keeps the detection end of the detection piece 42 in the preset detection posture facing the weld, further ensuring the accuracy of the detection results. At the same time, this diverse distribution method allows for flexible adjustment of the number and position of the rolling elements 412 according to the size and specifications of the saddle-shaped weld to be detected, improving the adaptability and versatility of the device for different detection scenarios.

[0051] The rolling element 412 includes a connecting sleeve 4121 and a ball bearing 4122. The ball bearing 4122 is tactilely connected to the connecting sleeve 4121. The connecting sleeve 4121 is detachably mounted on the mounting plate 411. Part of the ball bearing 4122 protrudes from the connecting sleeve 4121 and contacts the workpiece 1. This detachable connection method facilitates the replacement of the corresponding faulty rolling element 412 when the ball bearing 4122 is worn or stuck, without having to replace the entire mating part 41 structure, effectively reducing the maintenance cost and repair difficulty of the device. The rolling contact between the ball bearing 4122 and the workpiece 1 transforms the sliding friction between the mating part 41 and the workpiece 1 into rolling friction, significantly reducing the travel resistance of the detection device when moving along the saddle-shaped weld seam, making the detection process smoother. On the other hand, it also prevents the mating part 41 from scratching the surface of the workpiece 1, ensuring the surface quality of the workpiece 1 to be inspected. Meanwhile, the rolling characteristics of the ball bearing 4122 will not hinder the detection device from adjusting its posture according to the curvature of the saddle-shaped weld, and can always provide stable support for the mounting plate 411, continuously ensuring the stability of the detection component 4 and the accuracy of the detection.

[0052] Please see Figures 1-5 In some embodiments, the detection element 42 includes a detection head 421 and an elastic pad 422, wherein the detection head 421 is mounted on the mounting plate 411 via the elastic pad 422.

[0053] The detection head 421 of this application is mounted on the mounting plate 411 via an elastic pad 422. The elastic pad 422 has adaptive deformation capability and can automatically adjust to follow the curvature of the saddle-shaped weld, so that the detection head 421 always fits the surface of the weld to be inspected. It can also buffer the vibration interference generated during the movement of the detection device, avoid the distortion of the detection signal of the detection head 421 caused by the fluctuation of the detection gap, and further improve the reliability and accuracy of the eddy current detection results.

[0054] The elastic pad 422 can be a sponge pad, a rubber pad, or polyurethane. It uses its own elastic properties to fill the gap between the mounting plate 411 and the saddle-shaped weld, and presses the detection head 421 on it against the saddle-shaped weld. It can adapt to the saddle-shaped weld. Even when the saddle-shaped weld has slight undulations, the elastic pad 422 can still stably press the detection head 421 against the weld for detection, thereby improving the accuracy of the detection data.

[0055] At the same time, this type of elastic material is inexpensive, readily available, and easy to maintain and replace later. It does not add extra weight to the overall weight of the testing device, making it easier to move and transport. It does not affect the flexibility of the testing device moving along the weld seam, making the testing more flexible and reliable.

[0056] Please see Figures 1-8In some embodiments, the support frame 2 includes: a lateral movement component 21, a longitudinal movement component 22, and a support base 23. The support base 23 is mounted on the rotating frame, the lateral movement component 21 is mounted on the support base 23 and moves radially along the workpiece 1, and the longitudinal movement component 22 is mounted on the lateral movement component 21 and moves axially along the workpiece 1.

[0057] This application utilizes a support frame 2 comprising: a lateral movement assembly 21, a longitudinal movement assembly 22, and a support base 23. The support base 23 is mounted on a rotating frame. The lateral movement assembly 21 is mounted on the support base 23 and moves radially along the workpiece 1. The longitudinal movement assembly 22 is mounted on the lateral movement assembly 21 and moves axially along the workpiece 1. The lateral movement assembly 21 includes: a fixed base, a motor, and a lead screw. The fixed base is slidably connected to the support base 23. The motor is mounted on the fixed base. The lead screw is rotatably connected to the fixed base and threadedly connected to the support base 23. The motor can drive the lead screw to rotate via a synchronous belt. The rotating lead screw drives the fixed base to move closer to or away from the workpiece 1 on the support base. The moving fixed base, in turn, causes the longitudinal movement assembly 22, the swing assembly 3, and the detection assembly 4 mounted on it to move closer to or away from the workpiece 1. The lateral movement assembly... Component 21 also includes a distance sensor, which is mounted on the detection assembly 4 to monitor the radial distance between the end of the longitudinal moving assembly 22 and the workpiece 1 surrounding it. The movement of the fixed seat can be controlled by pre-setting the distance sensor. A monitoring range is pre-set for the distance sensor. When the rotating frame drives the support 23 to rotate, when the distance sensor detects that the distance between the end of the longitudinal moving assembly 22 and the outer surface of the workpiece 1 is greater than the set preset value, the motor drives the lead screw to rotate in the forward direction through the synchronous belt. The lead screw drives the fixed seat to move closer to the workpiece 1 on the support 23 along the radial direction of the workpiece 1. This causes the longitudinal moving assembly 22, the swing assembly 3, and the detection assembly 4 to move closer to the workpiece 1 in the radial direction. This ensures that when the swing assembly 3 drives the detection assembly 4 to rotate around, it fits tightly against the saddle-shaped weld in the radial direction, improving the accuracy of the detection. Similarly, when the distance sensor detects that the distance between the end of the longitudinal moving component 22 and the outer surface of the workpiece 1 is less than the set preset value, the motor drives the lead screw to rotate in the opposite direction via the synchronous belt. This causes the lead screw to drive the fixed seat to move away from the workpiece 1 in the radial direction along the support seat 23. Consequently, the longitudinal moving component 22, the swinging component 3, and the detection component 4 all move away from the workpiece 1 in the radial direction, thus preventing the support frame 2, the swinging component 3, and the detection component 4 rotating around the workpiece 1 from colliding with the workpiece 1. This improves safety and extends the service life of the device. The distance sensor monitoring allows the lateral moving component 21 to adjust the distance between itself and the workpiece 1 in real time, thereby improving the stability of the detection process and ensuring that the detection component 4 fits tightly against the saddle-shaped weld when rotating around the workpiece 1 for detection.

[0058] The longitudinal movement component 22 includes a double-rod cylinder, a probe telescopic frame, and a pressure sensor. The probe telescopic frame is slidably connected to the fixed base. The double-rod cylinder is installed between the probe telescopic frame and the fixed base. The pressure sensor is installed on the elastic pad 422 of the detection component 4, located between the elastic pad 422 and the saddle-shaped weld, to monitor the pressure between the elastic pad 422 and the saddle-shaped weld. The pressure range of the pressure sensor can be preset. When the pressure sensor detects that the pressure between the elastic pad 422 and the saddle-shaped weld is greater than the set pressure range, the double-rod cylinder drives the probe telescopic frame to retract, thereby reducing the pressure on the detection head 421 and providing a certain degree of protection for the detection head 421, thus extending its service life. However, at the same time as the probe telescopic frame retracts, the double-plane swing of the swing component 3 will cause the detection component 4 to fit tightly against the saddle-shaped weld, completing the detection of the saddle-shaped weld. Conversely, when the pressure sensor detects that the pressure between the elastic pad 422 and the saddle-shaped weld is less than the set pressure range, the double-rod cylinder drives the probe telescopic frame to extend, so that the support frame 2 and the swing assembly 3 press the detection assembly 4 against the saddle-shaped weld. Simultaneously, the swing assembly 3 can also drive the detection assembly 4 to fit tightly against the saddle-shaped weld through double-plane swinging, thus completing the detection of the saddle-shaped weld. In this way, through the cooperation of the lateral movement assembly 21 and the longitudinal movement assembly 22, the support frame 2 can drive the swing assembly 3 to fit the detection assembly 4 tightly against the workpiece 1, and the pressure applied to the detection assembly 4 can be adaptively adjusted according to the shape changes of the workpiece 1. This ensures detection stability and data accuracy while reducing wear on the detection assembly 4 and extending its service life.

[0059] The rotating frame can be a fixed frame, and the support base 23 is rotatably connected to the fixed frame. The support base 23 is driven to rotate on the fixed frame by a gear set and a motor. The fixed frame can also be directly and detachably installed on the workpiece 1 by bolts or clamping plates, so that the fixed frame and the workpiece 1 are coaxial. In this way, the support base 23 is driven to rotate by the gear set and the motor, and the detection component 4 can fit more tightly with each position of the saddle-shaped weld, improving the accuracy of the detection data.

[0060] The transverse moving component 21 and the longitudinal moving component 22 drive the swinging component 3 and the detection component 4 to move on the support base 23, enabling the detection device to detect saddle-shaped welds of different types or specifications, thus expanding its applicable range and making it more intelligent, simple, and convenient to operate.

[0061] Please see Figures 1-8 In some embodiments, the detection component 4 further includes a camera 43 mounted on the longitudinal movement component 22.

[0062] The application also includes a camera 43 mounted on the longitudinal moving component 22 through the detection component 4. The camera 43 is used to acquire surface images of the saddle-shaped weld area in real time. This can help operators to intuitively observe the appearance and formation of the weld, provide intuitive image references for the subsequent location and verification of defects, and monitor the fit between the detection head 421 and the saddle-shaped weld. It can also react and correct in time when a fault occurs.

[0063] The camera 43 can be connected to the longitudinal moving component 22 by bolts, which can change the monitoring angle of the camera 43. Then it can be fixed by bolts, thereby expanding the monitoring range and making it suitable for more usage environments.

[0064] The device can be electrically connected to the detection head 421, camera 43, lateral movement component 21, and longitudinal movement component 22 via an external power supply and central control module. This allows modification of the monitoring range of the pressure sensor and distance sensor, enabling the detection of saddle-shaped welds of more specifications and expanding the applicable range.

[0065] When inspecting saddle-shaped welds: First, fix the workpiece 1 coaxially with the support base 23. Then, activate the lateral movement component 21 and the longitudinal movement component 22, allowing them to press the detection component 4 against the saddle-shaped weld seam via the swing component 3. Next, start the motor to rotate the support base 23 around the workpiece 1. During this rotation, the support base 23 uses distance and pressure sensors to control the movement of the lateral and longitudinal movement components 21 and 22 in real time, ensuring the detection component 4 performs detection within a preset range. The detection component 4 follows the rotation of the support frame 2. During the movement, the interlacing swing curves of the first swinging member 31 and the second swinging member 32 drive the fitting member 41 to fit tightly between the two welded workpieces 1. Utilizing the interaction between the two welded workpieces 1 and the fitting member 41, the detection member 42 can fit onto the saddle-shaped weld while moving along it. Then, the elasticity of the elastic pad 422 enables the detection head 421 to adaptively and tightly fit onto the saddle-shaped weld, thereby completing the detection of the saddle-shaped weld. This operation is more labor-saving and convenient, improving the efficiency of detection and the accuracy of detection data.

[0066] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. An eddy current testing device for saddle surface welds, characterized in that, include: A support frame (2) that rotates around the workpiece (1), a swing assembly (3), and a detection assembly (4) for detecting the saddle surface weld, wherein at least one set of the swing assembly (3) is mounted on the support frame (2), and the detection assembly (4) is mounted on the swing assembly (3); The swing assembly (3) includes: a first swing member (31) and a second swing member (32). The first swing member (31) swings along a curve on the support frame (2), and the second swing member (32) swings along a curve on the first swing member (31). The swing curves of the first swing member (31) and the second swing member (32) intersect each other. The detection assembly (4) is installed on the first swing member (31). The detection assembly (4) is elastically pressed against the workpiece (1) by the swing of the first swing member (31) and the second swing member (32) so that the detection assembly (4) fits evenly and without gaps at the saddle surface weld for detection.

2. The eddy current detection device for saddle surface welds according to claim 1, characterized in that, The first swinging member (31) includes: a first swinging block (311), a first elastic member (312) and a first mating member (313). The first swinging block (311) is swung onto the support frame (2) through the first mating member (313), and the first elastic member (312) is connected between the first swinging block (311) and the support frame (2).

3. The eddy current detection device for saddle surface welds according to claim 2, characterized in that, The second swing member (32) includes: a second swing block (321), a second elastic member (322), and a second mating member (323). The second swing block (321) is swayed and mounted on the first swing block (311) through the second mating member (323). The second elastic member (322) is connected between the second swing block (321) and the first swing block (311).

4. The eddy current detection device for saddle surface welds according to claim 3, characterized in that, The first mating component (313) includes a limiting protrusion (3131) symmetrically arranged on the first swing block (311) and an arc groove (3132) arranged on the support frame (2). The multiple limiting protrusions (3131) are slidably connected to the arc groove (3132) to swing.

5. The eddy current detection device for saddle surface welds according to claim 3, characterized in that, The first mating component (313) includes a limiting protrusion (3131) symmetrically arranged on the support frame (2) and an arc groove (3132) arranged on the first swing block (311). The multiple limiting protrusions (3131) are slidably connected to the arc groove (3132) to swing. Or / and the second mating part (323) has the same structure as the first mating part (313); Or / and the swing curves of the first swing member (31) and the second swing member (32) are perpendicular to each other.

6. The eddy current detection device for saddle surface welds according to claim 3, characterized in that, The detection component (4) includes a bonding component (41) and a detection component (42). The bonding component (41) is mounted on the second swing block (321) and is in contact with the workpiece (1). The detection component (42) is mounted on the bonding component (41).

7. The eddy current detection device for saddle surface welds according to claim 6, characterized in that, The bonding component (41) includes: a mounting plate (411) and a rolling element (412). The mounting plate (411) is mounted on the second swing block (321), and a plurality of the rolling elements (412) are mounted on the mounting plate (411). The plurality of the rolling elements (412) are distributed in a polygonal, circular or arc shape.

8. The eddy current detection device for saddle surface welds according to claim 7, characterized in that, The detection component (42) includes a detection head (421) and an elastic pad (422), wherein the detection head (421) is mounted on the mounting plate (411) via the elastic pad (422).

9. The eddy current detection device for saddle surface welds according to claim 1, characterized in that, The support frame (2) includes: a transverse moving component (21), a longitudinal moving component (22), and a support base (23). The support base (23) is mounted on the rotating frame. The transverse moving component (21) is mounted on the support base (23) and moves radially along the workpiece (1). The longitudinal moving component (22) is mounted on the transverse moving component (21) and moves axially along the workpiece (1).

10. The eddy current detection device for saddle surface welds according to claim 9, characterized in that, The detection component (4) also includes a camera (43) mounted on the longitudinal movement component (22).

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