Water flow interference resisting structure and device for water immersion ultrasonic flaw detection

Abstract

The utility model belongs to the field of ultrasonic detection equipment, and particularly relates to a water flow interference resisting structure and device for water immersion ultrasonic flaw detection. The two rectifying assemblies are symmetrically arranged at the bottom of the mounting frame, each rectifying assembly comprises a plurality of porous rectifying plates which are distributed at intervals, a water flow rectifying channel in the length direction of the cylindrical workpiece is formed between every two adjacent porous rectifying plates, and an ultrasonic probe mounting area is formed between every two rectifying assemblies. Rectifying assemblies are arranged on the two sides of a cylindrical workpiece, and an ultrasonic probe is located between the rectifying assemblies. Water flow vortexes and bubbles caused by rotation of the workpiece enter a channel formed by the porous rectifying plate, disturbance is effectively weakened through mechanisms such as flow beam dispersion, friction energy consumption, momentum exchange and bubble breakage, and a flow field is more stable and uniform. The layer-by-layer rectification structure limits eddy current propagation, improves water flow smoothness, significantly reduces interference on the ultrasonic probe, improves flaw detection precision and reliability, and guarantees product quality.

Description

Technical Field

[0001] The present application belongs to the field of ultrasonic detection equipment, and specifically relates to a water flow interference resistant structure and device for water immersion ultrasonic flaw detection. Background Art

[0002] Water immersion ultrasonic testing is a nondestructive testing method that uses water as a coupling medium to transmit ultrasonic waves from the probe into the workpiece being inspected. The probe then detects defects by receiving reflected or transmitted signals. The probe emits high-frequency ultrasonic waves, which travel through the water medium into the object being tested. When the ultrasonic waves encounter defects such as cracks, pores, and inclusions within the material, they are reflected or scattered. The probe then receives these echoes and analyzes them. The water eliminates air gaps, allowing the ultrasonic waves to effectively transmit from the probe into the test piece, thereby improving detection sensitivity and accuracy.

[0003] When using water immersion ultrasonic testing on cylindrical workpieces (such as aluminum alloy round ingots), the workpiece usually needs to be rotated in the coupling tank, and a suspension device is used to drive the flaw detection device forward for inspection. However, when the workpiece diameter exceeds 500mm or the rotation speed is too fast, the water in the coupling tank is highly disturbed and contains many bubbles. These factors will directly cause interference signals, resulting in misjudgment of the flaw detection equipment and missed defects.

[0004] At present, the water immersion ultrasonic flaw detection device has poor anti-interference ability and low detection reliability when detecting large-sized (diameter greater than 500mm) aluminum alloy ingots. Utility Model Content

[0005] The technical problem to be solved by this application is to provide a water flow interference resistant structure and device for water immersion ultrasonic flaw detection, which can reduce water flow disturbance and bubbles near the ultrasonic probe, effectively improve the anti-interference ability during ultrasonic flaw detection, greatly improve the reliability of water immersion flaw detection, and effectively ensure product quality.

[0006] In a first aspect, the present application provides a water flow interference resistant structure for underwater ultrasonic flaw detection, comprising:

[0007] Mounting rack;

[0008] Two rectifier assemblies are symmetrically arranged at the bottom of the mounting frame. Each rectifier assembly includes a plurality of porous rectifier plates distributed at intervals. A water flow rectifier channel is formed between two adjacent porous rectifier plates along the length direction of the cylindrical workpiece. The installation area of ​​the ultrasonic probe is between the two rectifier assemblies.

[0009] Optionally, the bottom heights of the plurality of porous rectifying plates in the rectifying assembly first gradually decrease and then gradually increase from one side close to the installation area to the other side.

[0010] Optionally, bottom heights of the plurality of porous rectifying plates in the rectifying assembly gradually increase from one side close to the installation area to the other side.

[0011] Optionally, the distance between the two rectifier assemblies is smaller than the diameter of the cylindrical workpiece and is smaller than 500 mm.

[0012] Optionally, the porous rectifying plate has a plurality of through holes distributed in a rectangular array, and the aperture of the through holes is 3 mm-5 mm.

[0013] Optionally, the thickness of the porous rectifying plate is 1-5 times the diameter of the through hole.

[0014] Optionally, the through holes of two adjacent porous rectifier plates in each rectifier assembly are staggered.

[0015] Optionally, the distance between two adjacent porous rectifier plates in each rectifier assembly is 50 mm to 100 mm.

[0016] Optionally, each of the rectifying components includes 3-6 porous rectifying plates that are evenly distributed in sequence.

[0017] In a second aspect, the present application provides an immersion ultrasonic flaw detection device, comprising a plurality of ultrasonic probes distributed in a linear shape and the anti-water flow interference structure as described above.

[0018] The beneficial effects of this application are:

[0019] In a first aspect, the present application provides a water flow interference-resistant structure for underwater ultrasonic flaw detection. Two rectifier assemblies are positioned on either side of a cylindrical workpiece, with an ultrasonic probe positioned between them. During testing, the workpiece rotates under the influence of rollers, inducing water vortices and bubbles. These disturbances enter a water flow channel formed by multiple porous rectifier plates. The rectifier plates weaken or even eliminate vortices and bubbles through mechanisms such as stream dispersion, frictional energy dissipation, momentum exchange, and bubble bursting, making the flow field more uniform and stable. The layered rectifier structure effectively limits the propagation range of vortices, improves water flow smoothness, and significantly reduces interference with the ultrasonic probe's beam path, thereby enhancing flaw detection accuracy and reliability and ensuring product quality. Furthermore, the ends of the multiple porous rectifier plates connected to the mounting frame can be at the same or different heights. The porous rectifier plates in the two rectifier assemblies, located near the mounting area, can partially surround the cylindrical workpiece, allowing more vortices and bubbles near the cylindrical workpiece to enter the corresponding water flow rectifier channel. This effectively weakens vortices and bubbles, thereby improving the stability and smoothness of the water flow. In addition, the eddy current generated by the rotation of the cylindrical workpiece is in a shape that gradually diffuses outward. The contact area between the porous rectifier plate with a gradually increasing bottom height and the eddy current is larger, so that the eddy current can enter the water flow rectification channel more and be weakened or eliminated, further reducing the water flow disturbance and bubbles near the ultrasonic probe, reducing the impact of water flow and bubbles on the ultrasonic probe, greatly improving the reliability of water immersion testing, and effectively ensuring product quality.

[0020] The second aspect of this application provides an underwater ultrasonic flaw detection device. By disposing multiple ultrasonic probes in a linear arrangement and incorporating the aforementioned anti-water flow interference structure (such as a porous rectifier plate), it effectively suppresses the impact of water flow disturbances on ultrasonic signal propagation during testing, improving detection stability and data accuracy. This technical solution facilitates efficient and high-precision ultrasonic flaw detection in complex flow environments, enhancing the adaptability and reliability of the device and making it suitable for industrial nondestructive testing applications requiring high accuracy and environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the anti-water flow interference structure provided in an embodiment of the present application in use;

[0022] Figure 2 A schematic diagram of the structure of the porous rectifier plate provided in an embodiment of the present application.

[0023] In the figure: 110, mounting frame; 120, porous rectifier plate; 121, through hole; 200, ultrasonic probe; 300, cylindrical workpiece; 400, roller. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0025] First, as Figure 1 and Figure 2 As shown, the present application provides an anti-water flow interference structure for water immersion ultrasonic testing, including: a mounting frame 110 and two rectifying assemblies; wherein, the two rectifying assemblies are symmetrically arranged at the bottom of the mounting frame 110, and each rectifying assembly includes a plurality of porous rectifying plates 120 distributed at intervals, and a water flow rectifying channel along the length direction of the cylindrical workpiece 300 is formed between two adjacent porous rectifying plates 120, and the installation area of ​​the ultrasonic probe 200 is between the two rectifying assemblies; the bottom height of the multiple porous rectifying plates 120 in the rectifying assembly gradually decreases and then gradually increases from one side close to the installation area to the other side.

[0026] Compared to the prior art, the first aspect of this application provides a water flow interference-resistant structure for underwater ultrasonic testing. Two rectifier assemblies are located on either side of a cylindrical workpiece 300, with an ultrasonic probe 200 positioned between the two rectifier assemblies. During testing, the cylindrical workpiece 300 rotates under the drive of two rollers 400, generating vortices and bubbles in the water. These vortices and bubbles enter the water flow rectification channel formed by multiple porous rectifier plates 120. The multiple porous rectifier plates 120 weaken or even eliminate vortices and bubbles in the water through various mechanisms. When water or bubbles pass through the holes of the porous rectifier plates 120, the flow is dispersed into multiple small streams, reducing the formation of large-scale vortices and directing the flow in a more orderly direction. During this process, friction between the fluid and the surfaces and edges of the porous rectifier plates 120 increases the viscosity effect and causes energy to be dissipated as heat, thereby weakening the original vortex intensity. Simultaneously, momentum exchange occurs between the small streams of different speeds and directions, balancing the flow velocity differences, reducing turbulence intensity, and making the flow field more uniform and stable. For fluids containing bubbles, bubbles may burst or merge due to pressure changes, reducing the instability caused by them. In addition, the layers of barriers formed by the multiple porous rectifier plates 120 effectively prevent the expansion and propagation of eddies, limiting their impact range. Under the action of the porous rectifier plates 120, eddies and bubbles are weakened or even eliminated, improving the stability and smoothness of the water flow, significantly reducing interference in the sound beam path of the ultrasonic probe 200, effectively improving the anti-interference capability during ultrasonic flaw detection, significantly improving the reliability of water immersion flaw detection, and effectively ensuring product quality. In addition, the ends of the multiple porous rectifier plates 120 connected to the mounting frame 110 can be at the same horizontal height or at different heights. The porous rectifier plates 120 in the two rectifier assemblies near the mounting area can partially surround the cylindrical workpiece 300, allowing more eddies and bubbles near the cylindrical workpiece 300 to enter the corresponding water flow rectification channel, further reducing the effect of eddies and bubbles, and facilitating the improvement of the stability and smoothness of the water flow. In addition, the eddy current generated by the rotation of the cylindrical workpiece 300 is in a shape that gradually diffuses outward. The contact area between the porous rectifier plate 120 with a gradually increasing bottom height and the eddy current is larger, so that the eddy current can enter the water flow rectification channel more and be weakened or eliminated, further reducing the water flow disturbance and bubbles near the ultrasonic probe 200, reducing the impact of water flow and bubbles on the ultrasonic probe 200, greatly improving the reliability of water immersion testing, and effectively ensuring product quality.

[0027] It should be noted that Figure 1 The thick arrow on the left in the middle represents the rotation direction of the cylindrical workpiece 300, the three arrows on the right represent the direction of the water vortex, and the middle arrow represents the sound wave beam. Figure 1The mounting frame 110 is a simplified schematic diagram, which can actually be a three-dimensional frame structure and can serve as part or all of the frame of the mobile trolley of the water immersion ultrasonic flaw detection device. The mobile trolley can be operated by an overhead crane system or a gantry lifting equipment.

[0028] In another possible implementation, the bottom heights of the multiple porous rectifying plates 120 in the rectifying assembly gradually increase from one side near the mounting area to the other. Specifically, the eddy currents generated by the rotation of the cylindrical workpiece 300 gradually diffuse outward. The gradually increasing bottom heights of the multiple porous rectifying plates 120 provide a larger contact surface with the eddy currents, allowing more eddy currents to enter the water flow rectification channel, where they are weakened or eliminated. This further reduces water flow disturbances and bubbles near the ultrasonic probe 200, minimizing their impact on the ultrasonic probe 200. This significantly improves the reliability of water immersion testing and effectively ensures product quality.

[0029] In one possible implementation, the spacing between the two rectifier components is less than the diameter of the cylindrical workpiece 300 and less than 500mm, which helps to enhance the rectification effect. When the spacing is small, the fluid enters the second rectifier plate for secondary rectification before it has completely recovered from the turbulence after passing through the first rectifier plate, thereby more effectively weakening the residual vortex and disturbance. At the same time, the spacing can limit the development space of vortices such as the Karman vortex street, inhibit its formation and propagation, and reduce vibration and noise. In addition, a spacing of less than 500mm also meets the actual needs of the project, facilitates compact equipment layout, saves space, and takes into account manufacturing costs and maintenance convenience. This design is suitable for fields such as pipeline flow regulation, experimental water tanks and industrial cooling systems, and can achieve efficient and stable flow field control.

[0030] In one possible implementation, the porous rectifying plate 120 has a plurality of through holes 121 distributed in a rectangular array, and the diameter of the through holes 121 is 3 mm to 5 mm. For example, the diameter of the through holes 121 can be any typical but non-limiting value such as 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm, or a range between any two values.

[0031] In one possible implementation, the thickness of the porous rectifying plate 120 is 1-5 times the diameter of the through-hole 121. Specifically, a thickness of 1-5 times the diameter of the through-hole 121 can enhance the rectifying effect while maintaining structural strength. This thickness helps extend the fluid path, adjust flow velocity distribution, reduce turbulence, and facilitates processing and installation, balancing performance and practicality.

[0032] In one possible implementation, the through holes 121 of two adjacent porous rectifier plates 120 in each rectifier assembly are staggered. Specifically, the staggered arrangement of the through holes 121 of adjacent porous rectifier plates 120 can effectively break the linear flow trend of the fluid, break up the residual vortex and weaken the turbulence intensity, making the flow field more uniform and stable. At the same time, the staggered structure promotes lateral exchange of the fluid, enhances momentum transfer, improves flow velocity distribution, and avoids local scouring and vibration caused by jet concentration, thereby improving system stability and life. Compared with the aligned arrangement, this design achieves higher rectification efficiency in the same space, significantly enhances flow control capabilities, and has good engineering application value.

[0033] In one possible implementation, the spacing between two adjacent porous rectifier plates 120 in each rectifier assembly is 50 mm to 100 mm. Exemplarily, the spacing between two adjacent porous rectifier plates 120 in each rectifier assembly can be any typical but non-restrictive point value such as 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, or an interval value between any two point values. In this case, on the basis of preliminary rectification and energy dissipation, subsequent rectifier plates can effectively handle unsteady flows, reduce large-scale vortices, and improve flow orderliness. This spacing helps to attenuate secondary small vortices, adapt to a variety of flow rate conditions, and take into account installation and maintenance convenience and cost control.

[0034] In one possible implementation, each rectifying assembly includes 3-6 porous rectifying plates 120 evenly distributed in sequence. Specifically, through multi-stage, layer-by-layer rectification, eddies and disturbances in the fluid are gradually reduced, making the flow field more uniform and stable. This range of numbers ensures sufficient rectification levels to enhance flow control while avoiding the increased processing difficulty and flow resistance associated with an overly complex structure. It balances rectification efficiency, equipment compactness, and engineering feasibility, making it suitable for fluid control systems requiring high flow field stability.

[0035] Secondly, the present application provides an underwater ultrasonic flaw detection device, comprising multiple linearly distributed ultrasonic probes 200 and the aforementioned anti-water flow interference structure. By providing multiple linearly distributed ultrasonic probes 200 and combining the aforementioned anti-water flow interference structure (such as the porous rectifier plate 120), the underwater ultrasonic flaw detection device provided by the present application can effectively suppress the impact of water flow disturbances on ultrasonic signal propagation during testing, thereby improving detection stability and data accuracy. This technical solution facilitates efficient and high-precision ultrasonic flaw detection in complex flow environments, enhances equipment adaptability and reliability, and is suitable for industrial nondestructive testing applications requiring high detection accuracy and environmental adaptability.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0037] The one or more embodiments of this application are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application should be included in the scope of protection of this application.

Claims

1. A water flow interference resistant structure for water immersion ultrasonic flaw detection, characterized in that: include: Mounting frame (110); Two rectifying assemblies are symmetrically arranged at the bottom of the mounting frame (110), each rectifying assembly comprising a plurality of porous rectifying plates (120) distributed at intervals, a water flow rectifying channel along the length direction of the cylindrical workpiece (300) is formed between two adjacent porous rectifying plates (120), and an installation area for the ultrasonic probe (200) is located between the two rectifying assemblies; The bottom heights of the plurality of porous rectifying plates (120) in the rectifying assembly gradually decrease and then gradually increase from one side close to the installation area to the other side; Alternatively, the bottom heights of the plurality of porous rectifying plates (120) in the rectifying assembly gradually increase from one side close to the installation area to the other side.

2. The anti-water flow interference structure for water immersion ultrasonic flaw detection according to claim 1 is characterized in that: The distance between the two rectifier assemblies is smaller than the diameter of the cylindrical workpiece (300) and is smaller than 500 mm.

3. The anti-water flow interference structure for underwater ultrasonic flaw detection according to claim 2, characterized in that: The porous rectifying plate (120) has a plurality of through holes (121) distributed in a rectangular array, and the aperture of the through holes (121) is 3 mm to 5 mm.

4. The water flow interference resistant structure for underwater ultrasonic flaw detection according to claim 3, characterized in that: The thickness of the porous rectifying plate (120) is 1-5 times the diameter of the through hole (121).

5. The water flow interference resistant structure for underwater ultrasonic flaw detection according to claim 4, characterized in that: The through holes (121) of two adjacent porous rectifier plates (120) in each rectifier assembly are staggered.

6. The water flow interference resistant structure for underwater ultrasonic flaw detection according to any one of claims 1 to 5, characterized in that: The distance between two adjacent porous rectifier plates (120) in each rectifier assembly is 50 mm to 100 mm.

7. The water flow interference resistant structure for underwater ultrasonic flaw detection according to claim 6, characterized in that: Each of the rectification components comprises 3-6 porous rectification plates (120) that are evenly distributed in sequence.

8. An underwater ultrasonic flaw detection device, characterized in that: It comprises a plurality of ultrasonic probes (200) distributed in a linear shape and the anti-water flow interference structure according to any one of claims 1 to 7.

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