A water immersion longitudinal wave probe

Abstract

The utility model provides a kind of water immersion longitudinal wave probe, including shell;Wedge is installed in the upper end of the shell, so that the cavity is formed in the shell interior;At least a pair of mirror image symmetry first bevel is provided on its upper end face, first platform is formed between adjacent two first bevel, the inclination direction of the first bevel is by the first platform to the direction away from the first platform with preset deflection angle obliquely downward inclination;Multiple second bevels are provided on its lower end face, the second bevel is plane, the setting position of the second bevel corresponds with the setting position of the first bevel one to one, and its inclination direction and slope are same with the first bevel, so that the wedge forms thin layer structure;Multiple piezoelectric ceramics are respectively pasted on multiple second bevels.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 material, 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. 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 shortcomings of the prior art and provide a water immersion longitudinal wave probe, 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, including a housing; a wedge block, installed at the upper end of the housing, so that the interior of the housing forms a cavity; at least one pair of mirror-symmetrical first inclined surfaces are provided on its upper end surface, and a first platform is formed between two adjacent first inclined surfaces, the inclination direction of the first inclined surfaces is inclined downward at a preset angle from the first platform away from the first platform; a plurality of second inclined surfaces are provided on its lower end surface, 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 inclination direction and slope are 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 second platform is provided at the end of the first inclined surface away from the first platform, and the second platform is used to make the width side end face of the wedge flush with the width side end face of the outer shell.

[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 block into a pair of first inclined surfaces with a preset tilt angle and mirror symmetry, and processes the lower end face into a pair of second inclined surfaces corresponding to the first inclined surfaces, and attaches piezoelectric ceramics to the second inclined surfaces. Compared with the traditional longitudinal wave angle probe without a tilt angle, this invention can increase the effective detection of oblique defects on the inner and outer surfaces of the pipe and reduce the risk of missed defect detection.

[0016] 2. Compared with the first inclined plane with two inclines in the same direction and at the same angle, this utility model can reduce the number of longitudinal wave probes arranged in half along the detection path, reduce procurement costs, facilitate on-site installation and debugging, and ensure good consistency.

[0017] 3. 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.

[0018] 4. 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.

[0019] 5. In this utility model, the piezoelectric ceramic is aligned with at least one edge of the second inclined surface, ensuring the precise placement of the piezoelectric ceramic.

[0020] 6. The design of the second platform of this utility model can increase the contact area between the wedge and the shell, and improve the firmness of the seal connection between the wedge and the shell using adhesives or sound-absorbing materials. Attached Figure Description

[0021] Figure 1 The image shown is a three-dimensional structural diagram of the first angle of a water immersion longitudinal wave probe according to this utility model.

[0022] Figure 2 The diagram shown is a two-dimensional structural schematic of the second angle of a water immersion longitudinal wave probe according to this utility model.

[0023] Figure 3 The diagram shown is a structural schematic of the outer shell of this utility model.

[0024] Figure 4 The diagram shown is a schematic diagram of the first angle structure of the wedge block in this utility model.

[0025] Figure 5 The diagram shown is a schematic diagram of the second angle structure of the wedge block in this utility model.

[0026] In the figure: 10, outer shell; 20, wedge; 21, first inclined plane; 22, first platform; 23, second inclined plane; 24, second platform; 30, piezoelectric ceramic. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0031] See Figures 1-5This embodiment provides a water immersion longitudinal wave probe, 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 slope are provided on the upper surface of the wedge 20, and the two first inclined surfaces 21 are arranged in a figure-eight mirror symmetrical configuration; the first inclined surfaces 21 are inwardly concave arc surfaces; a first platform 22 is formed between the two first inclined surfaces 21. Specifically, the first inclined surfaces 21 are inclined downwards from the first platform 22 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 lower end face of the wedge 20 has two second inclined surfaces 23, which are planes. 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 those of the first inclined surfaces 21, making the wedge 20 a thin-layer structure. The wedge 20 uses 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 structure of the wedge 20, resulting in high probe detection sensitivity. The piezoelectric ceramic 30 is attached to the second inclined surfaces 23, with one piezoelectric ceramic 30 attached to each second inclined surface 23. Both piezoelectric ceramics 30 simultaneously emit and receive ultrasonic waves.

[0032] 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.

[0033] 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.

[0034] Furthermore, a second platform 24 is provided at the end of the first inclined surface 21 away from the first platform 22. The second platform 24 is used to make the width side end face of the wedge 20 flush with the width side end face of the outer shell 10, which can increase the contact area between the wedge 20 and the outer shell 10 and improve the firmness of sealing the wedge 20 and the outer shell 10 with adhesives or sound-absorbing materials.

[0035] This invention, by machining the upper end face of the wedge block 20 into at least one pair of mirror-symmetrical first inclined surfaces 21 with preset tilt angles, and machining the lower end face corresponding to the first inclined surfaces 21 into at least one pair of second inclined surfaces 23, and attaching piezoelectric ceramics 30 to the second inclined surfaces 23, can increase the effective detection of oblique defects on the inner and outer surfaces of pipes and reduce the risk of missed defects compared to traditional longitudinal wave oblique probes without tilt angles. Furthermore, compared to using two first inclined surfaces 21 with the same tilt direction and tilt angle, this solution can reduce the number of longitudinal wave probes arranged in the detection path by half, thus reducing the number of probe fine-tuning devices or the number of adjustments, lowering procurement costs, facilitating on-site installation and debugging, and ensuring good consistency.

[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-immersed longitudinal wave probe, characterized by, include shell; A wedge is installed at the upper end of the outer casing, thereby forming a cavity inside the outer casing; At least one pair of mirror-symmetrical first inclined surfaces are provided on its upper end surface, and a first platform is formed between two adjacent first inclined surfaces. The first inclined surfaces are inclined downward at a preset angle from the first platform away from the first platform. Multiple second inclined surfaces are provided on its lower end surface. 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 inclination direction and slope are the same as those of the first inclined surfaces, so that the wedge block forms a thin layer structure. Multiple piezoelectric ceramics are respectively attached to multiple second inclined surfaces.

2. The water immersion longitudinal wave probe of claim 1, wherein, The preset tilt angle is 5°~45°.

3. The water immersion longitudinal wave probe of claim 2, wherein, The first inclined surface is an inwardly concave arc surface.

4. The water immersion longitudinal wave probe of claim 1, wherein, 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 of claim 1, wherein, 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 of claim 5, wherein, The wedges are directly bonded to the outer casing using adhesive.

7. The water immersion longitudinal wave probe of claim 5, wherein, 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 of claim 1, wherein, A second platform is provided at the end of the first inclined surface away from the first platform. The second platform is used to make the width side end face of the wedge flush with the width side end face of the outer shell.

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