Ultrasonic detection device for saddle surface welding seam

Abstract

The invention relates to an ultrasonic detection device for a saddle surface welding seam. The ultrasonic detection device comprises a first linear driving assembly and a first scanning assembly, the first linear driving assembly is in sliding connection with the first scanning assembly, and the first linear driving assembly drives the first scanning assembly to do linear motion in the first direction; the first scanning assembly comprises a stroke cylinder and an ultrasonic probe assembly; the stroke air cylinder is in sliding connection with the ultrasonic probe assembly, the ultrasonic probe assembly is close to one side of the to-be-detected saddle surface welding seam, and the stroke air cylinder provides constant force output for the ultrasonic probe assembly so as to drive the ultrasonic probe assembly to conduct self-adaptive motion in the second direction according to curved surface distribution of the to-be-detected saddle surface welding seam; the first direction is perpendicular to the second direction; the ultrasonic probe is used for self-adapting to a complicated curved surface of a saddle surface weld joint and determining the radial position and the circumferential position of the ultrasonic probe according to the first linear driving assembly and the external rotating mechanism so as to determine the specific position of a weld joint defect, so that the overall detection precision can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to an ultrasonic testing device for a saddle surface weld. Background Art

[0002] The reactor pressure vessel is a nuclear primary component and one of the core components of the nuclear reactor coolant pressure boundary. It is composed of flange rings, barrel sections, inlet and outlet pipes and other cylinder assemblies, top cover assemblies, bottom heads, flange seals and other structures. Among them, the welds connecting the pressure vessel pipe seat and the cylinder are prone to defects such as bubbles, cracks and slag inclusions during the manufacturing and welding process. During the operation of the unit, the pressure vessel will be subjected to mechanical loads, pressure fluctuations, high temperature and high pressure, high radiation and thermal loads, which may cause defects to expand and cause leakage of the primary circuit medium. Therefore, it is necessary to regularly inspect and supervise the welds of the pressure vessel to ensure the integrity of the primary circuit pressure boundary, and ultrasonic testing is one of the main methods for detecting weld defects.

[0003] In the actual ultrasonic testing process, it is usually necessary to scan the reactor pressure vessel cylinder side and the nozzle side. However, due to the complex and special shape of the fillet area of ​​the reactor pressure vessel outlet nozzle, which is in the shape of a saddle surface, the cylinder side scanning range is large, and the probe space movement is irregular, which will cause the ultrasonic detection device probe to be unable to adapt to the complex saddle surface weld, making it difficult to locate the defect position, reducing the overall detection accuracy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a weld detection device which can adapt to saddle surface welds and determine the specific positions of weld defects.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide an ultrasonic detection device for a saddle surface weld, comprising: a first linear drive component and a first scanning component;

[0006] The first linear drive assembly is slidably connected to the first scanning assembly, and the first linear drive assembly drives the first scanning assembly to perform linear motion in a first direction;

[0007] The first scanning assembly includes: a stroke cylinder and an ultrasonic probe assembly;

[0008] The stroke cylinder is slidably connected to the ultrasonic probe assembly, the ultrasonic probe assembly is close to one side of the saddle surface weld to be measured, and the stroke cylinder provides a constant force output for the ultrasonic probe assembly to drive the ultrasonic probe assembly to perform adaptive movement in a second direction according to the curved surface distribution of the saddle surface weld to be measured;

[0009] The first direction and the second direction are perpendicular to each other.

[0010] Preferably, the ultrasonic probe assembly comprises: a linear guide shaft, a mounting plate, a probe fixing frame and an ultrasonic probe;

[0011] The mounting plate is arranged at one end of the linear guide shaft, and the stroke cylinder is slidably connected to the mounting plate;

[0012] A plurality of probe fixing frames are fixed on the mounting plate;

[0013] One of the ultrasonic probes is installed on each of the probe fixing frames.

[0014] Preferably, the ultrasonic probe assembly further comprises: a plurality of guide posts and guide balls;

[0015] The guide column is mounted on one end of the mounting plate close to the ultrasonic probe;

[0016] A guide ball is mounted on each guide column.

[0017] Preferably, the ultrasonic probe assembly further comprises: a constant force coil spring device;

[0018] The constant force coil spring device is slidably connected to the ultrasonic probe, and the constant force coil spring device drives the ultrasonic probe to perform linear motion in the second direction.

[0019] Preferably, the ultrasonic probe assembly further comprises: a crescent arc plate;

[0020] The outer arc surface of the crescent arc plate is provided with a sliding guide rail;

[0021] One end of the probe fixing frame close to the ultrasonic probe is arranged in the sliding guide rail to be slidably connected with the crescent arc plate;

[0022] The ultrasonic probe is mounted on the crescent arc plate.

[0023] Preferably, a rotation axis is provided on the inner arc surface of the crescent arc plate;

[0024] The ultrasonic probe is rotatably connected to the rotating shaft, and the axial direction of the rotating shaft is perpendicular to the second direction.

[0025] Preferably, the ultrasonic probe can rotate within a range of -10° to 40°.

[0026] Preferably, the first linear drive assembly comprises: a drive motor, a lead screw, a guide rail and a slider;

[0027] The driving motor is slidably connected to the screw rod;

[0028] The screw rod is slidably connected to the slider;

[0029] The slide block is disposed in the guide rail, and the slide block is slidably connected to the first scanning assembly.

[0030] Preferably, the ultrasonic detection device further comprises: a second linear drive component and a second scanning component;

[0031] The first linear drive assembly is fixedly connected to the second linear drive assembly, and the first linear drive assembly and the second linear drive assembly are symmetrically arranged;

[0032] The second scanning component is slidably connected to the second linear drive component, and the second scanning component is symmetrically arranged with the first scanning component.

[0033] Preferably, the ultrasonic detection device further comprises: a mounting interface;

[0034] The mounting interface is disposed between the first linear drive assembly and the second linear drive assembly.

[0035] The implementation of the present invention has the following beneficial effects: the first linear drive assembly is slidably connected to the first scanning assembly, and the first linear drive assembly drives the first scanning assembly to perform linear motion in the first direction; the first scanning assembly includes: a stroke cylinder and an ultrasonic probe assembly; the stroke cylinder is slidably connected to the ultrasonic probe assembly, and the ultrasonic probe assembly is close to one side of the saddle surface weld to be measured, and the stroke cylinder provides a constant force output for the ultrasonic probe assembly to drive the ultrasonic probe assembly to perform adaptive motion in the second direction according to the curved surface distribution of the saddle surface weld to be measured; the first direction and the second direction are perpendicular to each other. Through the constant force output of the stroke cylinder, the ultrasonic probe assembly can adapt to the complex curved surface of the saddle surface weld, so that the ultrasonic probe assembly can always fit the saddle surface weld. In addition, the driving directions of the first linear drive assembly and the stroke cylinder are independent of each other. When the first linear drive assembly is in motion, it will not affect the actual position of the ultrasonic probe assembly in the second direction. Therefore, when the external rotating mechanism controls the first linear drive assembly to perform circular or star-shaped motion, the radial position and circumferential position of the ultrasonic probe can be determined based on the first linear drive assembly and the external rotating mechanism to determine the specific location of the weld defect, thereby improving the overall detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0037] Figure 1 It is a schematic diagram of the overall structure of the ultrasonic detection device for the saddle surface weld of the present invention;

[0038] Figure 2It is a structural schematic diagram of the ultrasonic probe assembly of the present invention;

[0039] Figure 3 It is a schematic diagram of detecting the vertical cross-section position of the saddle surface weld to be tested according to the present invention;

[0040] Figure 4 It is a schematic diagram of detecting the horizontal cross-sectional position of the saddle surface weld to be tested according to the present invention. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0042] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0044] The invention provides an ultrasonic detection device for a saddle surface weld, which is used for improving the overall detection accuracy.

[0045] like Figure 1 , Figure 3 and Figure 4 As shown, the ultrasonic detection device for the saddle surface weld in the embodiment of the present invention includes: a first linear drive component 1 and a first scanning component 2; the first linear drive component 1 is slidably connected to the first scanning component 2, and the first linear drive component 1 drives the first scanning component 2 to perform linear motion in a first direction; the first scanning component 2 includes: a stroke cylinder 21 and an ultrasonic probe component 22; the stroke cylinder 21 is slidably connected to the ultrasonic probe component 22, and the ultrasonic probe component 22 is close to one side of the saddle surface weld to be tested, and the stroke cylinder 21 provides a constant force output for the ultrasonic probe component 22 to drive the ultrasonic probe component 22 to perform adaptive motion in the second direction according to the curved surface distribution of the saddle surface weld to be tested; the first direction and the second direction are perpendicular to each other.

[0046] In this embodiment, the ultrasonic probe assembly 22 is used to fit the weld of the inner wall at the connection between the pressure vessel pipe and the cylinder to detect defects in the weld. The stroke cylinder 21 is used to drive the ultrasonic probe assembly 22 to perform linear motion in the second direction so that the ultrasonic probe assembly 22 is close to the weld. When the stroke cylinder 21 outputs constant force, the ultrasonic probe assembly 22 can adapt to the saddle-shaped weld so that it can continue to fit the saddle-shaped weld. The second direction is parallel to the axial direction of the pressure vessel pipe. The first linear drive assembly 1 drives the stroke cylinder 21 and the ultrasonic probe assembly 22 in the first scanning assembly 2 to perform linear motion in the first direction at the same time.

[0047] Since an annular scanning method or a star scanning method is usually used for ultrasonic testing of the weld at the connection between the pressure vessel pipe and the cylinder, the annular scanning method is: the ultrasonic probe assembly 22 performs an annular scanning along the axis of the pressure vessel pipe as the center and is spaced at a certain distance to form a group of concentric circle scanning trajectories; the star scanning method is: the ultrasonic probe assembly 22 points to the axis of the pressure vessel pipe to perform radial scanning and is spaced at a certain distance to form a group of star scanning trajectories. Therefore, the first linear drive assembly 1 can be externally connected to an external rotating mechanism, and the external rotating mechanism can control the first linear drive assembly 1 to perform circumferential selection, so as to drive the first linear drive assembly 1 and the first scanning assembly 2 to realize an annular scanning or star scanning of the saddle surface weld.

[0048] Optional, such as Figure 2As shown, the ultrasonic probe assembly 22 in the embodiment of the present invention includes: a linear guide shaft 221, a mounting plate 222, a probe fixing frame 223 and an ultrasonic probe 224; the mounting plate 222 is arranged at one end of the linear guide shaft 221, and the stroke cylinder 21 is slidably connected to the mounting plate 222; a plurality of probe fixing frames 223 are fixed on the mounting plate 222; and an ultrasonic probe 224 is installed on each probe fixing frame 223.

[0049] In this embodiment, the first linear drive component 1 is slidably connected to the linear guide shaft, the mounting plate 222 is arranged at one end of the linear guide column 225 close to the weld, and the piston rod of the stroke cylinder 21 is slidably connected to the mounting plate 222. When the first linear drive component 1 drives the linear guide shaft 221 to move in the first direction, the stroke cylinder 21 and the mounting plate 222 also move with the linear guide shaft 221. Two or three probe fixing frames 223 are fixed on the mounting plate 222, and each probe fixing frame 223 is correspondingly installed with an ultrasonic probe 224, so that multiple ultrasonic probes 224 can be used simultaneously to detect defects in the weld, so as to improve the detection tolerance and detection efficiency. The number of installed probe fixing frames 223 can be determined according to the actual usage, and is not specifically limited here.

[0050] Optional, such as Figure 2 As shown, the ultrasonic probe assembly 22 in the embodiment of the present invention further includes: a plurality of guide posts 225 and guide balls 226 ; the guide posts 225 are mounted on one end of the mounting plate 222 close to the ultrasonic probe 224 ; and a guide ball 226 is mounted on each guide post 225 .

[0051] In this embodiment, a plurality of guide posts 225 can be installed on the mounting plate 222, and the guide posts 225 are parallel to the probe fixing frame 223. A guide ball 226 is installed at the end of each guide post 225, and the guide ball 226 is used to support and fit the inner wall of the pressure vessel cylinder. When the ultrasonic probe 224 performs annular scanning or star scanning, the guide ball 226 continues to fit the inner wall of the pressure vessel cylinder to reduce the friction of the ultrasonic probe 224 directly contacting the inner wall of the pressure vessel cylinder during the scanning process. For example: when two guide posts 225 are installed on the mounting plate 222 and each guide post 225 is correspondingly installed with a guide ball 226, one of the guide balls A will keep fitting with the inner wall of the pressure vessel under the constant force of the stroke cylinder 21, and the other guide ball B will be in a suspended state. When the external rotating mechanism controls the ultrasonic probe assembly 22 to move to different angles, the guide ball B will replace the guide ball A to fit the inner wall of the pressure vessel, and the guide ball A will be in a suspended state at this time. By alternately fitting different guide balls 226 , the guide balls 226 can be kept in continuous fit with the inner wall of the pressure vessel cylinder during the annular scanning or star scanning process.

[0052] Optional, such as Figure 2 As shown, the ultrasonic probe assembly 22 in the embodiment of the present invention further includes: a constant force coil spring device 227; the constant force coil spring device 227 is slidably connected to the ultrasonic probe 224, and the constant force coil spring device 227 drives the ultrasonic probe 224 to perform linear motion in the second direction.

[0053] In this embodiment, after the stroke cylinder 21 drives the guide ball 226 to fit the inner wall of the pressure vessel to achieve the primary positioning of the ultrasonic probe 224, a constant force coil spring device 227 can be provided to drive the ultrasonic probe 224 for secondary positioning. The constant force coil spring device 227 can provide the ultrasonic probe 224 with a coupling force degree of freedom in the second direction to improve the adaptability of the ultrasonic probe 224 to the saddle surface weld. It can be understood that each ultrasonic probe 224 can be provided with a corresponding constant force coil spring device 227.

[0054] Optional, such as Figure 2 As shown, the ultrasonic probe assembly 22 in the embodiment of the present invention also includes: a crescent arc plate 228; the outer arc surface of the crescent arc plate 228 is provided with a sliding guide rail 13; the end of the probe fixing frame 223 close to the ultrasonic probe 224 is arranged in the sliding guide rail 13 to be slidably connected with the crescent arc plate 228; the ultrasonic probe 224 is installed on the crescent arc plate 228.

[0055] In this embodiment, a sliding member can be provided on the probe fixing frame 223, and the sliding member is provided in the sliding guide rail 13 of the crescent arc plate 228, so that the crescent arc plate 228 can perform circumferential rotational motion through the sliding cooperation between the sliding member and the sliding guide rail 13, thereby providing a circumferential degree of freedom for the ultrasonic probe 224 installed on the seamount of the crescent arc plate 228, thereby further improving the adaptability of the ultrasonic probe 224 to the saddle surface weld.

[0056] Optional, such as Figure 2 As shown, a rotating shaft 2281 is provided on the inner arc surface of the crescent arc plate 228 in the embodiment of the present invention; the ultrasonic probe 224 is rotatably connected to the rotating shaft 2281, and the axial direction of the rotating shaft 2281 is perpendicular to the second direction.

[0057] In this embodiment, a rotating shaft 2281 for rotating the ultrasonic probe 224 can be set on the inner arc surface of the crescent arc plate 228, providing the ultrasonic probe 224 with a rotational freedom with the rotating shaft 2281 as the axis, thereby further improving the adaptability of the ultrasonic probe 224 to the saddle surface weld.

[0058] Optional, such as Figure 2 As shown, the rotatable angle of the ultrasonic probe 224 in the embodiment of the present invention is -10° to 40°.

[0059] In this embodiment, the rotatable angle of the ultrasonic probe 224 can be set to -10° to 40° to adapt to the angle change of the circular scanning or the star scanning. Specifically, it can be adjusted according to actual needs, such as adjusting the rotatable angle to -5° to 50° or 0° to 70°, which is not limited here.

[0060] Optional, such as Figure 1 As shown, the first linear drive component 1 in the embodiment of the present invention includes: a drive motor 11, a screw rod 12, a guide rail 13 and a slider 14; the drive motor 11 is slidably connected to the screw rod 12; the screw rod 12 is slidably connected to the slider 14; the slider 14 is arranged in the guide rail 13, and the slider 14 is slidably connected to the first scanning component 2.

[0061] In this embodiment, when the driving motor 11 rotates forward or reversely, the screw rod 12 moves forward or backward under the action of the driving motor 11; when the screw rod 12 moves, the slider 14 connected to the screw rod 12 will slide in the guide rail 13 driven by the screw rod 12, and at this time, the first scanning component 2 connected to the slider 14 will also slide, thereby controlling the movement of the first scanning component 2 in the first direction.

[0062] Optional, such as Figure 1 As shown, the ultrasonic detection device in the embodiment of the present invention also includes: a second linear drive component 3 and a second scanning component 4; the first linear drive component 1 is fixedly connected to the second linear drive component 3, and the first linear drive component 1 and the second linear drive component 3 are symmetrically arranged; the second scanning component 4 is slidably connected to the second linear drive component 3, and the second scanning component 4 and the first scanning component 2 are symmetrically arranged.

[0063] In this embodiment, a set of second linear drive components 3 and second scanning components 4 having the same structure as the first linear drive component 1 and the first scanning component 2 can be symmetrically arranged, and the first linear drive component 1 and the second linear drive component 3 are on the same straight line. The second linear drive component 3 and the second scanning component 4 work simultaneously with the first linear drive component 1 and the first scanning component 2 to realize simultaneous detection of different welds, so as to improve detection efficiency.

[0064] Optional, such as Figure 1 As shown, the ultrasonic detection device in the embodiment of the present invention further includes: a mounting interface 5 ; the mounting interface 5 is arranged between the first linear drive component 1 and the second linear drive component 3 .

[0065] In this embodiment, a mounting interface 5 can be set between the connection between the first linear drive component 1 and the second linear drive component 3, and the mounting interface 5 can be connected to an external rotating mechanism to simultaneously drive the first linear drive component 1 and the first scanning component 2 as well as the second linear drive component 3 and the second scanning component 4 to perform circular scanning and star scanning.

[0066] The working process of the ultrasonic detection device for the saddle surface weld in the embodiment of the present invention is as follows:

[0067] 1. Device installation: Specifically, first connect the ultrasonic detection device of the saddle surface weld to the external rotating mechanism through the installation interface 5, then connect the air pipe of the stroke cylinder 21, the signal cable of the ultrasonic probe 224, and the control cables of the first linear drive assembly 1 and the second linear drive assembly 3, and then adjust the first linear drive assembly 1 and the second linear drive assembly 3 to the initial position of the ultrasonic probe 224 at the maximum in the first direction, and adjust the stroke cylinder 21 to the retracted state; next, control the external rotating mechanism to move the first linear drive assembly 1 and the second linear drive assembly 3 to a horizontal state, and adjust the axis of the connection between the first linear drive assembly 1 and the second linear drive assembly 3 to be concentric with the axis of the pressure vessel pipe. Finally, control the first linear drive assembly 1 and the second linear drive assembly 3 to move so that the ultrasonic probe 224 gradually approaches the surface of the weld to be tested and maintains a certain distance.

[0068] 2. Start the weld inspection: Specifically, start the ultrasonic acquisition software, set the acquisition plan, and access the circumferential position encoder signal and the radial position encoder signal; then, control the stroke cylinder 21 to open and extend, set the appropriate constant force of the stroke cylinder 21, so that the guide ball 226 fits with the inner wall of the cylinder, and the ultrasonic probe 224 fits with the inner wall surface of the cylinder, and the ultrasonic probe 224 is fitted; the ultrasonic detection device of the saddle surface weld performs the scanning operation according to the annular track or star track set by the scanning plan, and the ultrasonic acquisition software starts to record the ultrasonic signal. During the scanning process, the drive motor 11 of the external rotating mechanism and the drive motors 11 of the first linear drive assembly 1 and the second linear drive assembly 3 only move independently to scan different circumferential positions. Due to the constant force control of the stroke cylinder 21, the guide ball 226 will adaptively extend and retract to ensure that the guide ball 226 fits with the inner wall surface of the cylinder in real time. The ultrasonic probe 224 realizes full-position detection of the inspected weld under the action of the three degrees of freedom: coupling force degree of freedom, circumferential degree of freedom, and rotational degree of freedom. After the scanning is completed, the ultrasonic data collection results are reviewed to check whether there is any data loss or unclearness, and additional data that does not meet the requirements is collected until the collection work is completed.

[0069] 3. End the operation: Specifically, control the stroke cylinder 21 to retract, so that the ultrasonic probe 224 is separated from the surface of the weld to be tested, and then move the ultrasonic detection device of the saddle surface weld to a safe position, and finally remove the relevant cables to complete the detection operation.

[0070] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. An ultrasonic detection device for saddle surface welds, characterized in that: include: A first linear drive assembly and a first scanning assembly; The first linear drive assembly is slidably connected to the first scanning assembly, and the first linear drive assembly drives the first scanning assembly to perform linear motion in a first direction; The first scanning assembly includes: a stroke cylinder and an ultrasonic probe assembly; The stroke cylinder is slidably connected to the ultrasonic probe assembly, the ultrasonic probe assembly is close to one side of the saddle surface weld to be measured, and the stroke cylinder provides a constant force output for the ultrasonic probe assembly to drive the ultrasonic probe assembly to perform adaptive movement in a second direction according to the curved surface distribution of the saddle surface weld to be measured; The first direction and the second direction are perpendicular to each other.

2. The ultrasonic detection device for saddle surface weld according to claim 1, characterized in that: The ultrasonic probe assembly comprises: a linear guide shaft, a mounting plate, a probe fixing frame and an ultrasonic probe; The mounting plate is arranged at one end of the linear guide shaft, and the stroke cylinder is slidably connected to the mounting plate; A plurality of probe fixing frames are fixed on the mounting plate; One of the ultrasonic probes is installed on each of the probe fixing frames.

3. The ultrasonic detection device for saddle surface weld according to claim 2, characterized in that: The ultrasonic probe assembly also includes: a plurality of guide posts and guide balls; The guide column is mounted on one end of the mounting plate close to the ultrasonic probe; A guide ball is mounted on each guide column.

4. The ultrasonic detection device for saddle surface weld according to claim 2, characterized in that: The ultrasonic probe assembly further comprises: a constant force coil spring device; The constant force coil spring device is slidably connected to the ultrasonic probe, and the constant force coil spring device drives the ultrasonic probe to perform linear motion in the second direction.

5. The ultrasonic detection device for saddle surface weld according to claim 2, characterized in that: The ultrasonic probe assembly further comprises: a crescent arc plate; The outer arc surface of the crescent arc plate is provided with a sliding guide rail; One end of the probe fixing frame close to the ultrasonic probe is arranged in the sliding guide rail to be slidably connected with the crescent arc plate; The ultrasonic probe is mounted on the crescent arc plate.

6. The ultrasonic detection device for saddle surface weld according to claim 5, characterized in that: A rotating shaft is arranged on the inner arc surface of the crescent arc plate; The ultrasonic probe is rotatably connected to the rotating shaft, and the axial direction of the rotating shaft is perpendicular to the second direction.

7. The ultrasonic detection device for saddle surface weld according to claim 6, characterized in that: The ultrasonic probe can rotate at an angle of -10° to 40°.

8. The ultrasonic detection device for saddle surface weld according to claim 1, characterized in that: The first linear drive assembly includes: a drive motor, a lead screw, a guide rail and a slider; The driving motor is slidably connected to the screw rod; The screw rod is slidably connected to the slider; The slide block is disposed in the guide rail, and the slide block is slidably connected to the first scanning assembly.

9. The ultrasonic detection device for saddle surface weld according to claim 1, characterized in that: The ultrasonic detection device further includes: a second linear drive component and a second scanning component; The first linear drive assembly is fixedly connected to the second linear drive assembly, and the first linear drive assembly and the second linear drive assembly are symmetrically arranged; The second scanning component is slidably connected to the second linear drive component, and the second scanning component is symmetrically arranged with the first scanning component.

10. The ultrasonic detection device for saddle surface weld according to claim 9, characterized in that: The ultrasonic detection device further comprises: a mounting interface; The mounting interface is disposed between the first linear drive assembly and the second linear drive assembly.

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