Ultrasonic phased array probing assembly for weld joint scanning

Abstract

An ultrasonic phased array probing assembly for weld joint scanning is used for scanning dissimilar metal weld joints of a large-diameter pipe of a nuclear power plant and comprises a probe and a wedge block, the probe comprises a probe body, a fixing part and a wire outlet, and a connecting slope is arranged on the lower portion of the probe body and used for being matched with the wedge block; the fixing part is used for being fixedly connected with a wedge block; the wire outlet is used as a cable connecting port of the probe; the wedge block comprises a connecting part, the connecting part is an inclined surface, the connecting part is used for being matched with the connecting inclined surface, and the wedge block is longitudinally assembled and connected with the probe. The device has the advantages that the probing assembly is small in size, the cable outgoing mode is flexible, and the probing assembly is novel in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of in-service inspection of nuclear power plants, in particular to an ultrasonic phased array detection component used for welding seam scanning. Background Art

[0002] Large diameter steel pipe welds have traditionally been inspected using methods such as radiographic testing and conventional ultrasonic testing. Due to the small spacing between tube rows in radiographic testing, most of the time only one irradiation can be performed, which limits the effective detection range and the existence of blind spots. Due to the limitation of the crack detection angle, it is not sensitive to cracks. Radiographic testing causes radiation damage and cannot be performed at the same time as other types of work, requiring construction time, but the detection effect is better than traditional ultrasonic testing. At the same time, radiographic testing requires the consumption of film, and compared to other detection methods, it also has problems such as higher costs. Conventional ultrasonic testing technology requires multiple probes for combined inspection, which is time-consuming and seriously affects the construction period during maintenance. In addition, due to the many influencing factors inside the weld, the defect detection effect is not good, but it has the characteristic of being able to operate simultaneously with other inspections and maintenance.

[0003] At present, ultrasonic phased array detection technology is a rapidly developing and widely used advanced new ultrasonic detection technology. Compared with conventional ultrasonic detection, it can achieve multi-angle and multi-directional scanning of the detection object by setting different focusing laws, and display the signal as an intuitive image. In addition, the detection sensitivity of the phased array probe is relatively higher. This technology has been widely used in the detection of various complex structural parts.

[0004] Ultrasonic phased array detection technology has the characteristics of operating simultaneously with other inspection and maintenance, with intuitive imaging, high detection efficiency, and good defect detection effect. Because ultrasonic phased array detection technology uses electronic methods to control the focusing and scanning of the sound beam, it has a fast detection speed and good sound beam accessibility, and can detect thin-walled workpieces. And by optimizing the control of the focus size, focus depth and sound beam direction, the detection resolution, signal-to-noise ratio and sensitivity can be improved. It has simulation imaging technology, which can intuitively show the real characteristic position of the defect, and the detection results are intuitive, and the detection data can be fully recorded. Ultrasonic phased array detection technology has gradually become an important detection method for large-diameter pipe weld detection.

[0005] When inspecting large-diameter pipe welds at nuclear power sites, due to design and structural reasons (pipeline connection valves, tees and elbows, etc.), ultrasonic inspection is not accessible on one side and cannot meet the requirements of double-sided scanning of welds in standard specifications. If only one-side ultrasonic scanning is performed during the inspection process, there is a risk of missed defects and inaccurate quantitative evaluation of defects. Therefore, the use of special phased array probes has become an effective means of inspection in confined spaces.

[0006] In view of this, the inventor of the present application designed an ultrasonic phased array detection component for weld scanning in order to overcome the above technical problems. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the defect in the prior art that, when inspecting large-diameter pipe welds at nuclear power sites, ultrasonic inspection is not accessible on one side due to design and structure reasons, and the requirement for double-sided scanning of welds in standard specifications cannot be met. An ultrasonic phased array detection component for weld scanning is provided.

[0008] The utility model solves the above technical problems through the following technical solutions:

[0009] The utility model provides an ultrasonic phased array detection component for weld scanning, which is characterized in that the ultrasonic phased array detection component is used for scanning dissimilar metal welds of large-diameter pipes in nuclear power plants, and comprises a probe and a wedge block. The probe comprises a probe body, a fixing portion and a wire outlet. A connecting bevel is arranged at the lower portion of the probe body, and the connecting bevel is used to match with the wedge block; the fixing portion is used to be fixedly connected with the wedge block; the wire outlet serves as a cable connection port of the probe; the wedge block comprises a connecting portion, and the connecting portion is a bevel, and the connecting portion is used to match with the connecting bevel, and the wedge block is longitudinally assembled and connected with the probe.

[0010] According to an embodiment of the utility model, the wire outlet is arranged on the side of the probe body and is located on a vertical plane adjacent to the connecting inclined surface.

[0011] According to an embodiment of the present utility model, the wire outlet protrudes outwards from the side of the probe body.

[0012] According to an embodiment of the utility model, the protruding direction of the wire outlet is the same as the sound wave propagation direction of the probe.

[0013] According to an embodiment of the present utility model, the width of the assembly dimension of the ultrasonic phased array detection component is 15 mm, and the height of the assembly dimension is 19.5 mm.

[0014] According to one embodiment of the present invention, the length of the assembly dimension of the ultrasonic phased array detection component is 22 mm.

[0015] According to an embodiment of the utility model, the probe is a self-focusing linear array probe.

[0016] According to an embodiment of the utility model, the fixing portion is a fixing screw hole, and the probe and the wedge block are assembled and fixed by cooperating with the fixing screw hole and the screw.

[0017] According to an embodiment of the utility model, a water injection hole is formed on the probe, a water outlet groove is formed on the wedge block, and the water injection hole and the water outlet groove are connected via a flow channel.

[0018] According to an embodiment of the utility model, the bottom of the wedge block is a curved surface, which can fit and match the surface of the large-diameter pipe to be scanned.

[0019] The positive and progressive effects of the utility model are:

[0020] The ultrasonic phased array detection component for weld scanning of the utility model has at least the following advantages:

[0021] The utility model is mainly used for scanning large-diameter pipes in nuclear power plants, and has the advantages of small size of the detection component, flexible cable outlet mode, novel structure of the detection component, etc. Compared with the traditional structure detection component, the detection component can realize scanning in a smaller space, reducing the inaccessible area of ​​large-diameter pipe scanning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0023] Figure 1 The utility model is a three-dimensional schematic diagram of an ultrasonic phased array detection component used for welding seam scanning.

[0024] Figure 2A The utility model is a side view schematic diagram of an ultrasonic phased array detection component used for welding seam scanning.

[0025] Figure 2B It is a top view schematic diagram of an ultrasonic phased array detection component used for weld scanning of the utility model.

[0026] Figure 3 The utility model is a cross-sectional schematic diagram of an ultrasonic phased array detection component used for welding seam scanning.

[0027] Figure 4 The utility model is a schematic diagram of the installation and coordination of an ultrasonic phased array detection component and a chain scanning frame for welding seam scanning.

[0028] Figure 5A It is a three-dimensional schematic diagram of an ultrasonic phased array probe in the prior art.

[0029] Figure 5B It is a top view schematic diagram of an ultrasonic phased array probe in the prior art.

[0030] Figure 5C It is a side view schematic diagram of an ultrasonic phased array probe in the prior art.

[0031] Figure 6 The present invention is a schematic diagram of the installation method of the probe and the wedge of the ultrasonic phased array detection assembly in the prior art.

[0032] [Reference Signs]

[0033] Probe 100

[0034] Probe body 110

[0035] Connecting slope 111

[0036] Fixing portion 120

[0037] Outlet 130

[0038] Water injection hole 140

[0039] Wedge 200

[0040] Connecting part 210

[0041] Water outlet 220

[0042] Runner 230

[0043] Chain Scanner 300

[0044] Probe holder 310

[0045] Lock switch 320

[0046] Encoder 330 DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Embodiments of the utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the utility model, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the utility model are selected from well-known and commonly used terms, some of the terms mentioned in the utility model specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the utility model not only by the actual terms used, but also by the meaning implied by each term.

[0049] like Figure 1 to Figure 3 As shown, the utility model provides an ultrasonic phased array detection component for weld scanning, wherein the ultrasonic phased array detection component is used for scanning dissimilar metal welds of large diameter pipes in nuclear power plants, and comprises a probe 100 and a wedge 200.

[0050] The probe 100 includes a probe body 110 , a fixing portion 120 and a wire outlet 130 .

[0051] A connecting inclined surface 111 is disposed at the lower portion of the probe body 110 , and the connecting inclined surface 111 is used to match with the wedge block 200 .

[0052] The fixing portion 120 is used to be fixedly connected to the wedge block 200 .

[0053] The cable outlet 130 serves as a cable connection port of the probe 100 .

[0054] The wedge block 200 includes a connecting portion 210 , which is an inclined surface. The connecting portion 210 is used to match with the connecting inclined surface 111 . The wedge block 200 is assembled and connected to the probe 100 in a longitudinal manner.

[0055] The longitudinal assembly connection means that the probe 100 extends vertically upward compared to the wedge block 200 after the assembly is completed.

[0056] like Figure 6 As shown, an existing ultrasonic phased array detection assembly is shown, in which the probe 100 and the wedge block 200 are assembled and connected in a transverse manner, resulting in that the probe 100 of the ultrasonic phased array detection assembly occupies a larger space.

[0057] The assembly mode of the probe 100 and the wedge 200 of the ultrasonic phased array detection assembly for weld scanning of the utility model is that the probe is assembled longitudinally. Compared with the detection assembly of the traditional transverse assembly of the probe, this new probe assembly method reduces the space occupied by the probe 100 and is suitable for operations in confined spaces on site.

[0058] When inspecting a weld where the space between one side of the weld and the edge of the pipe is limited, the ultrasonic phased array detection assembly for weld scanning of the utility model has obvious advantages over the phased array detection assembly of the traditional transverse assembly structure. Under the same array element area, the required width of the phased array detection assembly of the traditional transverse assembly structure in the detection direction is twice or even more than that of the phased array ultrasonic detection assembly of the utility model.

[0059] like Figure 1 to Figure 3 As shown, as a preferred embodiment of the ultrasonic phased array detection assembly for weld scanning of the utility model, the wire outlet 130 is arranged on the side of the probe body 110 and is located on the vertical plane C adjacent to the connecting inclined surface 111.

[0060] Preferably, the wire outlet 130 protrudes outward from a side surface of the probe body 110 .

[0061] Preferably, the protruding direction of the wire outlet 130 is the same as the sound wave propagation direction of the probe 100 .

[0062] like Figure 1 to Figure 3 As shown, the protruding direction of the wire outlet 130 is the same as the protruding direction of the wedge block 200 on the ultrasonic phased array probing assembly.

[0063] like Figure 5A to Figure 5C As shown, it is a conventional arrangement method of the wire outlet 130 , in which the wire outlet 130 is arranged on a vertical plane D opposite to the connecting inclined surface 111 .

[0064] The outlet 130 of the ultrasonic phased array detection assembly for weld scanning of the utility model adopts a side outlet mode. Compared with the traditional left and right outlet mode, the side outlet 130 can more flexibly change the direction of the cable according to the arrangement of the on-site probe 100 and the detection space, thereby adapting to the requirements of on-site detection. Due to the side outlet mode, the flexible outlet direction allows more choices for the installation position of the probe 100 in a specific working environment.

[0065] like Figure 2A to Figure 2B As shown, as a preferred implementation of the ultrasonic phased array detection component for weld scanning of the utility model, the width of the assembly dimension of the ultrasonic phased array detection component is 15 mm, and the height of the assembly dimension is 19.5 mm.

[0066] Further preferably, the length of the assembly dimension of the ultrasonic phased array probing assembly is 22 mm.

[0067] Since the probe 100 and the wedge 200 of the ultrasonic phased array detection assembly for weld scanning of the utility model have a small assembly volume, the overall assembly size is only 15mm×19.5mm, and the small-sized detection assembly is easy to be assembled on the chain scanning frame 300, thereby realizing the subsequent automatic scanning function for large-diameter pipes.

[0068] As a preferred embodiment of the ultrasonic phased array detection assembly for weld scanning of the utility model, the probe 100 is a self-focusing linear array probe.

[0069] The self-focusing linear array probe can transmit and receive sound waves through only one probe 100 .

[0070] like Figure 1 to Figure 2A As shown, as a preferred embodiment of the ultrasonic phased array detection assembly for weld scanning of the utility model, the fixing portion 120 is a fixing screw hole, and the probe 100 and the wedge block 200 are assembled and fixed by cooperating with the screw through the fixing screw hole.

[0071] The connection mode of assembling and fixing by the fixing screw hole and the screw has the characteristic of being easy to disassemble, and is convenient for the maintenance and replacement of the probe 100 and the wedge block 200.

[0072] like Figure 3As shown, as a preferred embodiment of the ultrasonic phased array detection component for weld scanning of the utility model, a water injection hole 140 is opened on the probe 100, a water outlet groove 220 is opened on the wedge block 200, and the water injection hole 140 and the water outlet groove 220 are connected by a flow channel 230.

[0073] When in use, one end of the water pipe is connected to the water injection hole 140 of the probe 100, and the other end is connected to an external water pump. When scanning begins, the water pump is turned on to inject deionized water as a coupling agent into the probe 100, and the deionized water flows out from the water outlet 220 of the wedge block 200 to achieve the coupling effect during the scanning process. This new method of adding coupling agent is more conducive to the addition of coupling agent during the scanning process, so that the coupling effect of the probe 100 meets the detection requirements.

[0074] As a preferred embodiment of the ultrasonic phased array detection assembly for weld scanning of the utility model, the bottom of the wedge block 200 is a curved surface, which can fit and match the surface of the large diameter pipe to be scanned.

[0075] The curved surface design can better adapt to the shapes and sizes of various large-diameter pipes and improve scanning accuracy and stability.

[0076] The specific implementation steps of the ultrasonic phased array detection component for weld scanning of the utility model when used on site are as follows:

[0077] Step 1, install the detection component: select a wedge 200 that matches the tube according to the diameter of the detection tube, apply engine oil coupling at the contact point between the probe 100 and the wedge 200, fix the probe 100 and the wedge 200 with screws, install the probe 100 at the probe clamping part of the chain scanning frame 300, connect the water pipe led out of the water pump to the water injection hole 140 of the probe 100, and connect the probe 100 to the ultrasonic phased array detector.

[0078] Step 2: Install the chain scanning frame: select the specification and length of the chain according to the diameter of the test pipe. When the length of the chain is sufficient to surround the pipe with a certain margin, adjust the locking switch 320 so that the wedge block 200 fits the surface of the pipe and the chain is in a taut state.

[0079] Step 3, start scanning: turn on the water pump, and when the deionized water flows out of the water outlet 220 of the wedge block 200, rotate the scanning frame to start scanning.

[0080] like Figure 4 , which is a schematic diagram of the structure of a chain scanning frame 300, which includes a probe clamping frame 310, a locking switch 320, an encoder 330 and other components.

[0081] When scanning large diameter pipes, Figure 4The chain scanning frame 300 is installed around the outer wall of the large diameter pipe, and the scanning frame is attached to the outer wall of the large diameter pipe by adjusting the locking switch 320 on the chain scanning frame 300.

[0082] The ultrasonic phased array detection component for weld scanning of the utility model is usually installed on Figure 4 The chain scanning frame 300 is shown at position A.

[0083] According to the use requirements, an ultrasonic phased array detection component can also be added at position B of the probe clamping frame 310. The purpose of clamping and setting the detection component at position B is to achieve simultaneous scanning of both sides of the weld.

[0084] The traditional detection technology is affected by the structural reasons of the large-diameter pipe workpiece itself and the on-site working conditions, and the detection effect is not very ideal. Therefore, the ultrasonic phased array detection method is used in combination with the existing detection technology to improve the detection effect. The ultrasonic phased array detection assembly for weld scanning proposed in the utility model changes the traditional probe assembly method in the past, and is convenient for assembly on the chain scanning frame 300; the detection assembly changes the traditional probe outlet method in the past, reduces the overall size of the detection assembly, and is convenient for the installation and detection of the chain scanning frame 300 and the detection assembly in a confined space.

[0085] The ultrasonic phased array detection assembly for weld scanning of the utility model is mainly used for scanning large-diameter pipes in nuclear power plants, and has the characteristics of small detection assembly volume, flexible cable outlet mode, novel detection assembly structure, etc. Compared with the traditional structure detection assembly, the detection assembly can realize scanning in a smaller space, reducing the inaccessible area of ​​large-diameter pipe scanning.

[0086] The advantages of the present invention are mainly reflected in the detection operations within a limited space. For the detection of dissimilar metal welds on large-diameter pipes, when the weld is located at the proximal end of the pipe, the traditional transversely assembled detection assembly cannot complete the scanning of one side of the weld within a limited length range due to its excessive width. The side-outlet probe adopted in the present invention is longitudinally assembled, which greatly reduces the width of the detection assembly and allows the detection assembly to scan one side of the weld within a limited range.

[0087] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. An ultrasonic phased array detection assembly for weld scanning, characterized in that: The ultrasonic phased array detection assembly is used for scanning dissimilar metal welds of large diameter pipes in nuclear power plants, and includes a probe and a wedge. The probe comprises a probe body, a fixing portion and a wire outlet. A connecting inclined surface is provided at the lower part of the probe body, and the connecting inclined surface is used to cooperate with the wedge block; The fixing portion is used to be fixedly connected to the wedge block; The outlet is used as a cable connection port for the probe; The wedge block includes a connecting portion, which is an inclined surface. The connecting portion is used to match the connecting inclined surface. The wedge block is longitudinally assembled and connected with the probe.

2. The ultrasonic phased array detection assembly for weld scanning according to claim 1, characterized in that: The wire outlet is arranged on the side of the probe body and is located on a vertical plane adjacent to the connecting inclined surface.

3. The ultrasonic phased array detection assembly for weld scanning according to claim 2, characterized in that: The wire outlet protrudes outwards from the side of the probe body.

4. The ultrasonic phased array detection assembly for weld scanning according to claim 3, characterized in that: The protruding direction of the wire outlet is the same as the sound wave propagation direction of the probe.

5. The ultrasonic phased array detection assembly for weld scanning according to claim 4, characterized in that: The width of the ultrasonic phased array detection component is 15 mm, and the height of the ultrasonic phased array detection component is 19.5 mm.

6. The ultrasonic phased array detection assembly for weld scanning according to claim 5, characterized in that: The length of the ultrasonic phased array detection component assembly dimension is 22 mm.

7. The ultrasonic phased array detection assembly for weld scanning according to claim 1, characterized in that: The probe is a self-focusing linear array probe.

8. The ultrasonic phased array detection assembly for weld scanning according to claim 1, characterized in that: The fixing portion is a fixing screw hole, and the probe and the wedge block are assembled and fixed by cooperating with the fixing screw hole and the screw.

9. The ultrasonic phased array detection assembly for weld scanning according to claim 1, characterized in that: The probe is provided with a water injection hole, the wedge block is provided with a water outlet groove, and the water injection hole and the water outlet groove are connected via a flow channel.

10. The ultrasonic phased array detection assembly for weld scanning according to claim 1, characterized in that: The bottom of the wedge is a curved surface, which can fit and match the surface of the large-diameter pipe to be scanned.

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