An ultrasonic testing device for saddle welds

Abstract

The application relates to an ultrasonic detection device for a saddle surface weld, which comprises a first linear driving assembly and a first scanning assembly; the first linear driving assembly is slidably connected with the first scanning assembly, and the first linear driving assembly drives the first scanning assembly to move linearly in a first direction; the first scanning assembly comprises a stroke cylinder and an ultrasonic probe assembly; the stroke cylinder is slidably connected with the ultrasonic probe assembly, the ultrasonic probe assembly is close to one side of the measured saddle surface weld, the stroke cylinder provides constant force output for the ultrasonic probe assembly, so as to drive the ultrasonic probe assembly to move adaptively in a second direction according to the curved surface distribution of the measured saddle surface weld; the first direction and the second direction are perpendicular to each other; the device is used for adapting to the complex curved surface of the saddle surface weld, and the radial position and the circumferential position of the ultrasonic probe are determined according to the first linear driving assembly and an external rotating mechanism, so that the specific position of the weld defect can be determined, and the overall detection precision can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nondestructive testing, and particularly relates to an ultrasonic detection device for saddle surface welds. BACKGROUND

[0002] The reactor pressure vessel belongs to a nuclear primary component and is one of core components of a nuclear reactor coolant pressure boundary, which is composed of a flange ring, a barrel section, a water inlet / outlet pipe, a top cover assembly, a bottom head, and a flange seal. In the manufacturing and welding process, the connecting weld between the pipe seat of the pressure vessel and the barrel is prone to defects such as bubbles, cracks and slag inclusion. During the operation of the unit, the pressure vessel may be subjected to mechanical load, pressure fluctuation, high temperature and pressure, high radiation and thermal load, which may cause the defects to expand and lead to leakage of the primary loop medium. Therefore, the welds of the pressure vessel need to be regularly inspected and supervised to ensure the integrity of the primary loop pressure boundary, and ultrasonic detection is one of the main detection methods for weld defects.

[0003] In the actual ultrasonic detection process, the barrel side and the pipe side of the reactor pressure vessel need to be scanned in two directions. Due to the complex and special shape of the inner corner area of the outlet pipe of the reactor pressure vessel, which is in the shape of a saddle, the scanning range of the barrel side is large, and the space movement of the probe is irregular, which may cause the probe of the ultrasonic detection device to be unable to adapt to the complex saddle-shaped weld, the defect position to be difficult to locate, and the overall detection accuracy to be reduced. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a weld detection device that can adapt to the saddle-shaped weld and determine the specific position of the weld defect.

[0005] The technical solution adopted by the present application to solve the technical problem is to provide an ultrasonic detection device for a saddle-shaped weld, comprising: a first linear drive assembly and a first scanning assembly.

[0006] The first linear drive assembly is in sliding connection with the first scanning assembly, and the first linear drive assembly drives the first scanning assembly to move linearly in a first direction.

[0007] The first scanning assembly comprises a stroke cylinder and an ultrasonic probe assembly.

[0008] The stroke cylinder is in sliding connection with the ultrasonic probe assembly, the ultrasonic probe assembly is close to one side of the saddle-shaped weld to be detected, and the stroke cylinder provides constant force output for the ultrasonic probe assembly to drive the ultrasonic probe assembly to move adaptively in a second direction according to the curved surface distribution of the saddle-shaped weld to be detected.

[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 in sliding connection with the mounting plate.

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

[0013] An ultrasonic probe is arranged on each probe fixing frame.

[0014] Preferably, the ultrasonic probe assembly further comprises a plurality of guide columns and guide balls.

[0015] The guide columns are arranged on the mounting plate close to one end of the ultrasonic probe.

[0016] A guide ball is arranged 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 in sliding connection with the ultrasonic probe, and the constant force coil spring device drives the ultrasonic probe to move linearly in the second direction.

[0019] Preferably, the ultrasonic probe assembly further comprises a crescent arc-shaped plate.

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

[0021] The end of the probe fixing frame close to the ultrasonic probe is arranged in the sliding guide rail to be in sliding connection with the crescent arc-shaped plate.

[0022] The ultrasonic probe is arranged on the crescent arc-shaped plate.

[0023] Preferably, the inner arc surface of the crescent arc-shaped plate is provided with a rotating shaft.

[0024] The ultrasonic probe is in rotating connection with the rotating shaft, and the axial direction of the rotating shaft is perpendicular to the second direction.

[0025] Preferably, the rotatable angle of the ultrasonic probe is -10°-40°.

[0026] Preferably, the first linear driving assembly comprises a driving motor, a lead screw, a guide rail and a sliding block.

[0027] The driving motor is in sliding connection with the lead screw.

[0028] The screw rod is in sliding connection with the sliding block.

[0029] The sliding block is arranged in the guide rail, and the sliding block is in sliding connection with the first scanning assembly.

[0030] Preferably, the ultrasonic detection device further comprises a second linear driving assembly and a second scanning assembly.

[0031] The first linear driving assembly is fixedly connected with the second linear driving assembly, and the first linear driving assembly and the second linear driving assembly are symmetrically arranged.

[0032] The second scanning assembly is in sliding connection with the second linear driving assembly, and the second scanning assembly is symmetrically arranged with the first scanning assembly.

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

[0034] The mounting interface is arranged between the first linear driving assembly and the second linear driving assembly.

[0035] The implementation of the present application has the following beneficial effects: the first linear driving assembly is in sliding connection with the first scanning assembly, the first linear driving assembly drives the first scanning assembly to move linearly in the first direction; the first scanning assembly comprises a stroke cylinder and an ultrasonic probe assembly; the stroke 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 weld, the stroke cylinder provides constant force output for the ultrasonic probe assembly to drive the ultrasonic probe assembly to move adaptively in the second direction according to the curved surface distribution of the to-be-detected saddle surface weld; 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. Moreover, the driving directions of the first linear driving assembly and the stroke cylinder are independent of each other, and when the first linear driving assembly acts, the actual position of the ultrasonic probe assembly in the second direction will not be affected. Therefore, when the external rotating mechanism controls the first linear driving assembly to move in a ring or star shape, the radial position and the circumferential position of the ultrasonic probe can be determined according to the first linear driving assembly and the external rotating mechanism, so as to determine the specific position of the weld defect, thereby improving the overall detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0036] The present application will be further described below in conjunction with the drawings and examples, wherein:

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

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

[0039] Figure 3 is a detection schematic diagram of a vertical cross-section position of a saddle surface weld to be detected of the present application;

[0040] Figure 4 is a detection schematic diagram of a horizontal cross-section position of a saddle surface weld to be detected of the present application. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and should not be understood as indicating that the devices or elements indicated must have a particular direction, and therefore should not be understood as limiting the present application.

[0042] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the following description, specific details such as specific system structures, techniques, etc. are presented for the purpose of explanation, not for the purpose of limitation, so as to thoroughly understand the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0044] The application provides a saddle-shaped weld ultrasonic detection device for improving overall detection accuracy.

[0045] As shown in Figure 1 、 Figure 3 and Figure 4 , the saddle-shaped weld ultrasonic detection device in the embodiment of the application comprises: a first linear driving assembly 1 and a first scanning assembly 2; the first linear driving assembly 1 is in sliding connection with the first scanning assembly 2, and the first linear driving assembly 1 drives the first scanning assembly 2 to move linearly in a first direction; the first scanning assembly 2 comprises: a stroke cylinder 21 and an ultrasonic probe assembly 22; the stroke cylinder 21 is in sliding connection with the ultrasonic probe assembly 22, the ultrasonic probe assembly 22 is close to one side of the saddle-shaped weld to be detected, and the stroke cylinder 21 provides constant force output for the ultrasonic probe assembly 22 to drive the ultrasonic probe assembly 22 to move adaptively in a second direction according to the curved surface distribution of the saddle-shaped weld to be detected; the first direction and the second direction are perpendicular to each other.

[0046] In the embodiment, the ultrasonic probe assembly 22 is used to adhere to the weld of the inner wall of the connection between the nozzle and the cylinder of the pressure vessel, so as to detect defects of the weld. The stroke cylinder 21 is used to drive the ultrasonic probe assembly 22 to move linearly in the second direction, so that the ultrasonic probe assembly 22 is close to the weld. When the stroke cylinder 21 provides constant force output, the ultrasonic probe assembly 22 can adapt to the saddle-shaped weld, so that it can continuously adhere to the saddle-shaped weld. The second direction is parallel to the axial direction of the nozzle of the pressure vessel. The first linear driving assembly 1 drives the stroke cylinder 21 and the ultrasonic probe assembly 22 in the first scanning assembly 2 to move linearly in the first direction at the same time.

[0047] Since the ultrasonic detection of the weld at the connection between the nozzle and the cylinder of the pressure vessel is usually carried out in a ring scanning mode or a star scanning mode, the ring scanning mode is that the ultrasonic probe assembly 22 performs ring scanning along the pressure vessel nozzle axis as the center and is spaced at a certain interval to form a group of concentric circle scanning tracks; the star scanning mode is that the ultrasonic probe assembly 22 performs radial scanning and is spaced at a certain interval to form a group of star scanning tracks. Therefore, the first linear driving assembly 1 can be circumscribed by an external rotating mechanism, the external rotating mechanism can control the first linear driving assembly 1 to select the circumferential direction, so as to drive the first linear driving assembly 1 and the first scanning assembly 2 to realize ring scanning or star scanning of the saddle-shaped weld.

[0048] Optionally, as shown in Figure 2As shown, the ultrasonic probe assembly 22 in this embodiment of the invention includes: a linear guide shaft 221, a mounting plate 222, a probe holder 223, and an ultrasonic probe 224; the mounting plate 222 is disposed 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 holders 223 are fixed on the mounting plate 222; and an ultrasonic probe 224 is mounted on each probe holder 223.

[0049] In this embodiment, the first linear drive assembly 1 is slidably connected to the linear guide shaft, and the mounting plate 222 is disposed at one end of the linear guide post 225 near the weld. The piston rod of the stroke cylinder 21 is slidably connected to the mounting plate 222. When the first linear drive assembly 1 drives the linear guide shaft 221 to move in the first direction, the stroke cylinder 21 and the mounting plate 222 also move under the drive of the linear guide shaft 221. Two or three probe holders 223 are fixed on the mounting plate 222, and each probe holder 223 is equipped with one ultrasonic probe 224, so that multiple ultrasonic probes 224 can be used simultaneously to detect defects in the weld, thereby improving the detection error tolerance and detection efficiency. The number of probe holders 223 installed can be determined according to the actual use, and is not limited here.

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

[0051] In this embodiment, several guide posts 225 can be installed on the mounting plate 222, and these guide posts 225 are parallel to the probe mounting bracket 223. Each guide post 225 has a guide ball 226 installed at its end. This guide ball 226 supports and conforms to the inner wall of the pressure vessel. When the ultrasonic probe 224 performs a circular or star-shaped scan, the guide ball 226 continuously maintains contact with the inner wall of the pressure vessel to reduce friction caused by direct contact between the ultrasonic probe 224 and the inner wall of the pressure vessel during the scan. For example, when two guide posts 225 are installed on the mounting plate 222, and each guide post 225 corresponds to a guide ball 226, one guide ball A will remain in contact with the inner wall of the pressure vessel under the constant force of the stroke cylinder 21, while the other guide ball B will be suspended. When the external rotation mechanism controls the ultrasonic probe assembly 22 to move to different angles, guide ball B will replace guide ball A and conform to the inner wall of the pressure vessel, at which point guide ball A will be suspended. By alternating the contact of different guide balls 226, the guide balls 226 can be kept in contact with the inner wall of the pressure vessel during the annular or star-shaped scanning process.

[0052] Optionally, as shown in Figure 2 The ultrasonic probe assembly 22 in the embodiment of the present application further comprises a constant force spring device 227, the constant force spring device 227 is in sliding connection with the ultrasonic probe 224, and the constant force spring device 227 drives the ultrasonic probe 224 to move linearly in the second direction.

[0053] In the embodiment, after the travel cylinder 21 drives the guide ball 226 to adhere to the inner wall of the pressure vessel to realize the first positioning of the ultrasonic probe 224, a constant force spring device 227 can be arranged to drive the ultrasonic probe 224 to be positioned secondly. The constant force spring device 227 can provide a coupling force degree of freedom in the second direction for the ultrasonic probe 224, so as to improve the adaptability of the ultrasonic probe 224 to the saddle-shaped weld. It can be understood that one constant force spring device 227 can be arranged corresponding to each ultrasonic probe 224.

[0054] Optionally, as shown in Figure 2 The ultrasonic probe assembly 22 in the embodiment of the present application further comprises a crescent arc-shaped plate 228, the outer arc surface of the crescent arc-shaped plate 228 is provided with a sliding guide rail 13, one end of the probe fixing frame 223 close to the ultrasonic probe 224 is arranged in the sliding guide rail 13, so as to be in sliding connection with the crescent arc-shaped plate 228, and the ultrasonic probe 224 is installed on the crescent arc-shaped plate 228.

[0055] In the embodiment, a sliding part can be arranged on the probe fixing frame 223, the sliding part is arranged in the sliding guide rail 13 of the crescent arc-shaped plate 228, so that the crescent arc-shaped plate 228 can rotate circumferentially through the sliding cooperation of the sliding part and the sliding guide rail 13, a circumferential degree of freedom is provided for the ultrasonic probe 224 installed on the crescent arc-shaped plate 228, so as to further improve the adaptability of the ultrasonic probe 224 to the saddle-shaped weld.

[0056] Optionally, as shown in Figure 2 The inner arc surface of the crescent arc-shaped plate 228 in the embodiment of the present application is provided with a rotating shaft 2281, the ultrasonic probe 224 is in rotating connection with the rotating shaft 2281, and the axial direction of the rotating shaft 2281 is perpendicular to the second direction.

[0057] In the embodiment, a rotating shaft 2281 for the rotation of the ultrasonic probe 224 can be arranged on the inner arc surface of the crescent arc-shaped plate 228, so as to provide a rotating degree of freedom for the ultrasonic probe 224 with the rotating shaft 2281 as the axis, so as to further improve the adaptability of the ultrasonic probe 224 to the saddle-shaped weld.

[0058] Optionally, as shown in Figure 2 The rotatable angle of the ultrasonic probe 224 in the embodiment of the present application is -10°-40°.

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

[0060] Optionally, as shown in Figure 1 The first linear driving assembly 1 in the embodiment of the application comprises a driving motor 11, a screw rod 12, a guide rail 13 and a sliding block 14. The driving motor 11 is in sliding connection with the screw rod 12. The screw rod 12 is in sliding connection with the sliding block 14. The sliding block 14 is arranged in the guide rail 13, and the sliding block 14 is in sliding connection with the first scanning assembly 2.

[0061] In the embodiment, when the driving motor 11 rotates forward or reversely, the screw rod 12 performs forward displacement or backward displacement under the action of the driving motor 11. When the screw rod 12 performs displacement, the sliding block 14 connected with the screw rod 12 will slide in the guide rail 13 under the driving of the screw rod 12. At this time, the first scanning assembly 2 connected with the sliding block 14 will also slide, so that the movement of the first scanning assembly 2 in the first direction can be controlled.

[0062] Optionally, as shown in Figure 1 The ultrasonic detection device in the embodiment of the application further comprises a second linear driving assembly 3 and a second scanning assembly 4. The first linear driving assembly 1 is fixedly connected with the second linear driving assembly 3, and the first linear driving assembly 1 and the second linear driving assembly 3 are symmetrically arranged. The second scanning assembly 4 is in sliding connection with the second linear driving assembly 3, and the second scanning assembly 4 is symmetrically arranged with the first scanning assembly 2.

[0063] In the embodiment, a set of second linear driving assemblies 3 and second scanning assemblies 4 which are the same in structure as the first linear driving assembly 1 and the first scanning assembly 2 can be symmetrically arranged, and the first linear driving assembly 1 and the second linear driving assembly 3 are on the same straight line. The second linear driving assembly 3 and the second scanning assembly 4 work at the same time as the first linear driving assembly 1 and the first scanning assembly 2, so as to realize the detection of different welds at the same time, thereby improving the detection efficiency.

[0064] Optionally, as shown in Figure 1 The ultrasonic detection device in the embodiment of the application further comprises a mounting interface 5. The mounting interface 5 is arranged between the first linear driving assembly 1 and the second linear driving assembly 3.

[0065] In this embodiment, an installation interface 5 can be arranged between the connection of the first linear drive assembly 1 and the second linear drive assembly 3, which can be connected with an external rotating mechanism to simultaneously drive the first linear drive assembly 1 and the first scanning assembly 2 and the second linear drive assembly 3 and the second scanning assembly 4 to perform annular scanning and star-shaped scanning.

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

[0067] 1. Device installation: Specifically, first, the ultrasonic detection device for saddle surface welds is connected with the external rotating mechanism through the installation interface 5, then the air pipe of the stroke air cylinder 21, the signal cable of the ultrasonic probe 224 and the control cable of the first linear drive assembly 1 and the second linear drive assembly 3 are connected, then the first linear drive assembly 1 and the second linear drive assembly 3 are adjusted to the initial position where the ultrasonic probe 224 is at the maximum in the first direction, and the stroke air cylinder 21 is adjusted to the retracted state; next, the external rotating mechanism is controlled to move the first linear drive assembly 1 and the second linear drive assembly 3 to the horizontal state, and the shaft center of the connection between the first linear drive assembly 1 and the second linear drive assembly 3 is adjusted to be concentric with the shaft center of the pressure vessel connecting pipe. Finally, the first linear drive assembly 1 and the second linear drive assembly 3 are controlled to gradually move the ultrasonic probe 224 close to the surface of the weld to be detected and keep a certain distance.

[0068] 2. Start weld detection: Specifically, first, the ultrasonic acquisition software is started, and the acquisition plan is set, and the circumferential position encoder signal and the radial position encoder signal are connected; then, the stroke air cylinder 21 is controlled to open and extend, and the appropriate constant force size of the stroke air cylinder 21 is set to make the guide ball 226 fit the inner wall of the cylinder, the ultrasonic probe 224 fit the surface of the inner wall of the cylinder, and the ultrasonic probe 224 fit completely; the ultrasonic detection device for saddle surface welds performs scanning work according to the annular track or star-shaped track set in the scanning plan, and the ultrasonic acquisition software starts to record the ultrasonic signal. During the scanning process, only the drive motors 11 of the external rotating mechanism and the first linear drive assembly 1 and the second linear drive assembly 3 move independently to scan different circumferential positions. Due to the constant force control of the stroke air cylinder 21, the guide ball 226 will adaptively extend and retract to ensure that the guide ball 226 is in real-time fit with the surface of the inner wall of the cylinder. Under the action of the coupling force freedom, the circumferential freedom and the rotating freedom of the ultrasonic probe 224, full-position detection of the weld under inspection is realized. After the scanning is completed, the ultrasonic data acquisition result is reviewed to check whether there is data loss or unclear situation, and the data that does not meet the requirements is supplemented to collect until the collection work is completed.

[0069] 3. End the work: specifically, control the stroke cylinder 21 to retract, make the ultrasonic probe 224 separate from the measured weld surface, then move the saddle weld ultrasonic detection device to a safe position, and finally remove the related cable to complete the detection work.

[0070] It can be understood that the above embodiments only express the preferred embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. An apparatus for ultrasonic testing of a saddle weld, characterized by The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device.

2. An apparatus for ultrasonic testing of saddle welds as claimed in claim 1, characterized in that The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device.

3. The apparatus for ultrasonic testing of saddle welds as defined in claim 1, characterized in that The application relates to an ultrasonic detection device.

4. The apparatus for ultrasonic testing of saddle welds as defined in claim 1, characterized in that The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device.

5. The apparatus for ultrasonic testing of saddle welds as defined in claim 1, characterized in that The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device.

6. An apparatus for ultrasonic testing of saddle welds as defined in claim 5, characterized in that The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. The application relates to an ultrasonic detection device. 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