Water immersion longitudinal wave probe for pipes

Abstract

The utility model provides a kind of water immersion longitudinal wave probe for pipe, including shell;Wedge is installed in the upper end of the shell;Its upper end face is provided with multiple first inclined surfaces with same inclination direction and slope, and the first inclined surface between adjacent two forms protrusion, and the inclination direction of the protrusion and the first inclined surface is by the length side of one side of the wedge to the length side of other side with preset deflection angle obliquely downward inclined;Its lower end face is provided with multiple second inclined surfaces, and the second inclined surface is plane, the setting position of the second inclined surface corresponds with the setting position of the first inclined surface one to one, and its inclination direction and slope are same with the first inclined surface, so that the wedge forms thin layer structure;Multiple piezoelectric ceramics are respectively attached on multiple second inclined surfaces.The utility model compared with traditional longitudinal wave oblique probe not setting deflection angle can effectively detect the oblique defect of the inner and outer surface of pipe, reduce defect missed detection risk.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic flaw detection technology, specifically to a water immersion longitudinal wave probe for pipes. Background Technology

[0002] Ultrasonic testing, as a highly efficient and non-destructive testing technology, is widely used in the quality control of various high-requirement pipe materials. It determines the presence of internal defects by emitting high-frequency sound waves into the material being tested and receiving the reflected signals. Due to its advantages such as high sensitivity, strong penetration, and the ability to automate testing, ultrasonic testing has become an indispensable and important testing method in modern industry.

[0003] In ultrasonic testing, the orientation of defects has a significant impact on the test results. Studies have shown that when the defect is perpendicular to the direction of ultrasonic wave propagation, its reflected echo is the strongest, making it the easiest for the detection system to identify and capture. Conversely, when the defect is parallel to the direction of ultrasonic wave propagation, the reflected signal is extremely weak, and may even be completely undetectable, leading to the risk of missed detections. This orientation effect is an important physical characteristic in ultrasonic testing and one of the key technical challenges that current nondestructive testing technologies urgently need to overcome.

[0004] Currently, conventional ultrasonic testing processes for steel pipes and other tubular materials primarily focus on detecting longitudinal defects (i.e., defects parallel to the pipe's axis). These defects are typically caused by factors such as raw material cracks and uneven deformation during rolling, and are the main targets of traditional quality control systems. However, in actual production and use, it has been found that steel pipes may also contain defects with an oblique angle, such as spiral cracks, oblique inclusions, or irregular damage caused by weld heat-affected zones. Existing longitudinal wave probes do not adequately consider the detection requirements of such oblique defects, making them difficult to effectively identify in certain situations, resulting in a significant risk of missed detection. This not only affects the overall quality of the product but may also pose safety hazards during subsequent use. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a water immersion longitudinal wave probe for pipes, which can solve the problem that the longitudinal wave probe cannot detect oblique defects on the inner and outer surfaces of pipes, resulting in a large risk of missed detection.

[0006] To achieve the above and other objectives, this utility model is implemented through the following technical solution: This utility model proposes a water immersion longitudinal wave probe for pipes, including a shell; a wedge block, installed at the upper end of the shell, forming a cavity inside the shell; a plurality of first inclined surfaces with the same inclination direction and slope are provided on its upper end surface, and a protrusion is formed between two adjacent first inclined surfaces, the inclination direction of the protrusion and the first inclined surface being inclined downward from one side of the wedge block to the other side of the length at a preset deflection angle; a plurality of second inclined surfaces are provided on its lower end surface, the second inclined surfaces being planes, the positions of the second inclined surfaces corresponding one-to-one with the positions of the first inclined surfaces, and their inclination direction and slope being the same as the first inclined surfaces, so that the wedge block forms a thin-layer structure; a plurality of piezoelectric ceramics are respectively attached to the plurality of second inclined surfaces.

[0007] In one embodiment, the preset skew angle is 5° to 45°.

[0008] In one embodiment, the first inclined surface is an inwardly concave arc surface.

[0009] In one embodiment, the projected shape of the second inclined surface matches the shape of the piezoelectric ceramic, and the piezoelectric ceramic is attached to at least one edge of the second inclined surface.

[0010] In one embodiment, the wedge and piezoelectric ceramic are prefabricated into a probe semi-finished product. The probe semi-finished product with the piezoelectric ceramic attached to it is installed into the housing with the side facing down, forming a cavity with the housing. The probe semi-finished product is sealed to the housing.

[0011] In one embodiment, the wedge is directly bonded to the housing using an adhesive.

[0012] In one embodiment, a sound-absorbing material is poured into the cavity, and the sound-absorbing material cures to tightly bond the probe semi-finished product to the outer shell.

[0013] In one embodiment, a reinforcing block is provided at the lower end of the intersection of the first inclined surface and the other long side of the wedge.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model processes the upper end face of the wedge into a first inclined surface with two or more pre-set deflection angles, and the lower end face is processed into a second inclined surface with two or more pre-set deflection angles corresponding to the first inclined surface. Piezoelectric ceramics are glued onto the second inclined surface. Compared with the traditional longitudinal wave angle probe without deflection angles, this invention can increase the effective detection of oblique defects on the inner and outer surfaces of pipes and reduce the risk of missed defect detection.

[0016] 2. The present invention has a preset deflection angle of 5°~45°, which can detect longitudinal defects and oblique defects of various angles within the detection area.

[0017] 3. The wedge of this utility model adopts a thin-layer structure, and the first inclined surface is an inwardly concave arc surface, which makes the sound waves emitted by the piezoelectric ceramic less attenuated when passing through the thin-layer wedge, and the probe has high detection sensitivity.

[0018] 4. The piezoelectric ceramic of this utility model is aligned with at least one edge of the second inclined surface to ensure the precise placement of the piezoelectric ceramic.

[0019] 5. The design of the reinforcing block in this utility model can increase the contact area between the thinner side of the wedge block and the outer shell, thereby improving the firmness of the seal connection between the wedge block and the outer shell using adhesives or sound-absorbing materials. Attached Figure Description

[0020] Figure 1 The image shown is a three-dimensional structural diagram of the first angle of a water immersion longitudinal wave probe for pipes according to this utility model.

[0021] Figure 2 The diagram shown is a two-dimensional structural schematic of the water immersion longitudinal wave probe for pipes according to this utility model.

[0022] Figure 3 The diagram shown is a structural schematic of the outer shell of this utility model.

[0023] Figure 4 The diagram shown is a schematic diagram of the first angle structure of the wedge block in this utility model.

[0024] Figure 5 The diagram shown is a schematic diagram of the second angle structure of the wedge block in this utility model.

[0025] In the diagram: 10, outer shell; 20, wedge; 21, first inclined surface; 22, protrusion; 23, second inclined surface; 24, reinforcing block; 30, piezoelectric ceramic. Detailed Implementation

[0026] Please see Figures 1-5 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0027] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0028] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “a,” “an,” or “the,” as used herein, do not indicate a limitation of quantity, but merely indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The numbering of components in this specification, such as “first,” “second,” etc., is solely for distinguishing the described objects and has no sequential or technical meaning. The term “connection,” unless otherwise specified, includes both direct and indirect connections.

[0029] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0030] See Figures 1-5This embodiment provides a water immersion longitudinal wave probe for pipes, including a housing 10, a wedge 20, and a piezoelectric ceramic 30. The wedge 20 is installed on the upper end of the housing 10, forming a cavity inside the housing 10. Two first inclined surfaces 21 with the same inclination direction and slope are provided on the upper surface of the wedge 20; the first inclined surfaces 21 are inwardly concave arc surfaces; a protrusion 22 is formed between the two first inclined surfaces 21, and the protrusion 22 has the same inclination direction and slope as the first inclined surfaces 21. Specifically, the inclination direction of the first inclined surfaces 21 and the protrusion 22 is such that they slope downwards from one length side of the wedge 20 to the other length side at a preset deflection angle, which is 5°~45°. The deflection angle design of this embodiment enables the probe to effectively monitor oblique defects. The wedge 20 has two second inclined surfaces 23 on its lower end face. Each second inclined surface 23 is planar. The positions of the second inclined surfaces 23 correspond one-to-one with the positions of the first inclined surfaces 21, and their inclination direction and slope are the same as the first inclined surfaces 21, resulting in a thin-layer structure for the wedge 20. Isolation protrusions are formed between the second inclined surfaces 23. The wedge 20 employs a thin-layer structure, and the first inclined surface 21 is an inwardly concave arc surface, which minimizes the attenuation of sound waves emitted by the piezoelectric ceramic 30 as they pass through the thin-layer wedge 20, resulting in higher probe detection sensitivity. The piezoelectric ceramic 30 is attached to each of the second inclined surfaces 23, with one piezoelectric ceramic 30 attached to each second inclined surface 23.

[0031] Furthermore, the projected shape of the second inclined surface 23 matches the shape of the piezoelectric ceramic 30, for example, both being square, so that the piezoelectric ceramic 30 can be aligned with at least one edge of the second inclined surface 23 for attachment, thereby ensuring the accurate placement of the piezoelectric ceramic 30.

[0032] Furthermore, the shape of the upper surface of the outer shell 10 can be matched with the wedge 20 for connection. The wedge 20 and the piezoelectric ceramic 30 are prefabricated into a probe semi-finished product. The probe semi-finished product with the piezoelectric ceramic 30 glued on facing down is installed into the outer shell 10, forming a cavity with the outer shell 10. The probe semi-finished product is sealed to the outer shell 10. For example, the wedge 20 can be directly glued to the outer shell 10 using adhesive; alternatively, sound-absorbing material can be poured into the cavity, and the sound-absorbing material, after curing, will tightly bond the probe semi-finished product to the outer shell 10.

[0033] Furthermore, a reinforcing block 24 is provided at the lower end of the intersection of the first inclined surface 21 and the other long side of the wedge block 20. One end face of the reinforcing block 24 is flush with the end face of the other long side of the wedge block 20, which can increase the contact area between the end face of the other long side of the wedge block 20 and the outer shell 10, and improve the firmness of sealing the wedge block 20 and the outer shell 10 using adhesives or sound-absorbing materials.

[0034] This invention processes the upper end face of the wedge block 20 into two or more first inclined surfaces 21 with preset tilt angles, and the lower end face into two or more second inclined surfaces 23 corresponding to the first inclined surfaces 21. Piezoelectric ceramics 30 are then glued onto the second inclined surfaces 23. Compared with traditional longitudinal wave oblique probes without tilt angles, this invention can increase the effective detection of oblique defects on the inner and outer surfaces of pipes and reduce the risk of missed defects.

[0035] To further improve the defect detection rate, when using the water immersion longitudinal wave probe provided by this utility model to detect defects on the inner and outer surfaces of steel pipes, the first inclined surfaces 21 of two adjacent water immersion longitudinal wave probes can be arranged in opposite directions of inclination, that is, the first inclined surface 21 of one water immersion longitudinal wave probe is tilted to the left, and the first inclined surface 21 of the other water immersion longitudinal wave probe is tilted to the right, so as to ensure that defects on the inner and outer surfaces of steel pipes can be detected without blind spots.

[0036] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A water immersion longitudinal wave probe for pipes, characterized in that, include shell; A wedge is installed at the upper end of the outer casing, thereby forming a cavity inside the outer casing; The upper end face is provided with multiple first inclined surfaces with the same tilt direction and slope. A protrusion is formed between two adjacent first inclined surfaces. The tilt direction of the protrusion and the first inclined surface is inclined downward from one side of the length of the wedge to the other side at a preset tilt angle. The lower end face is provided with multiple second inclined surfaces. The second inclined surfaces are planes. The positions of the second inclined surfaces correspond one-to-one with the positions of the first inclined surfaces, and their tilt direction and slope are the same as those of the first inclined surfaces, so that the wedge forms a thin layer structure. Multiple piezoelectric ceramics are respectively attached to multiple second inclined surfaces.

2. The water immersion longitudinal wave probe for pipe according to claim 1, characterized by The preset tilt angle is 5°~45°.

3. The water immersion longitudinal wave probe for pipe according to claim 2, characterized by The first inclined surface is an inwardly concave arc surface.

4. The water immersion longitudinal wave probe for pipes according to claim 1, characterized in that, The projected shape of the second inclined surface matches the shape of the piezoelectric ceramic, and the piezoelectric ceramic is attached to at least one edge of the second inclined surface.

5. The water immersion longitudinal wave probe for pipes according to claim 1, characterized in that, The wedge and piezoelectric ceramic are prefabricated into a probe semi-finished product. The probe semi-finished product with the piezoelectric ceramic attached to it is installed into the housing with the side facing down, forming a cavity with the housing. The probe semi-finished product is sealed to the housing.

6. The water immersion longitudinal wave probe for pipes according to claim 5, characterized in that, The wedges are directly bonded to the outer casing using adhesive.

7. The water immersion longitudinal wave probe for pipes according to claim 5, characterized in that, Sound-absorbing material is poured into the cavity, and the sound-absorbing material cures to tightly bond the probe semi-finished product to the shell.

8. The water immersion longitudinal wave probe for pipes according to claim 1, characterized in that, A reinforcing block is provided at the lower end of the intersection of the first inclined surface and the other long side of the wedge.

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