CN221148595U - Detection device for ultrasonic detection of socket welding phased array of thin-wall non-standard pipe fitting - Google Patents

Abstract

The utility model discloses a detection device for ultrasonic detection of a socket welding phased array of a thin-wall non-standard pipe fitting, which comprises a wedge block and a probe, wherein the probe is arranged on the wedge block, the array element array type of the probe is a self-focusing linear array, the wedge block angle of the wedge block is 35-45 degrees, the front edge length of an incident point of the wedge block is 8-9 mm, the rear edge length of the incident point of the wedge block is 9-10 mm, the wedge block width of the wedge block is 20-25 mm, the intra-wedge sound path of the wedge block is 8-9 mm, and the self-coupling curvature of the probe is 26-30 mm. The detection device for the socket welding phased array ultrasonic detection of the thin-wall non-standard pipe fitting changes the curvature radius of the driven window of the phased array ultrasonic detection probe, and the detected area is provided with a finer sound beam group, so that the energy distribution is more uniform, the higher detection sensitivity can be obtained, the wedge size specification becomes smaller than before, the large-angle ultrasonic wave can be obtained, and the detection area is effectively covered.

Description

Phased array ultrasonic testing device for socket welding of thin-walled non-standard pipe fittings

Technical Field

The utility model relates to the field of phased array ultrasonic testing, in particular to a testing device for phased array ultrasonic testing of socket welding of thin-walled non-standard pipe fittings.

Background technique

Ultrasonic nondestructive testing technology, also known as ultrasonic nondestructive flaw detection technology, uses the phenomenon that the physical quantities of certain physical properties of ultrasound will change due to defects or differences in tissue structure in the material, and detects or measures these defects through certain detection methods. By utilizing the various propagation characteristics of ultrasound in objects, such as reflection and refraction, transmission and scattering attenuation, and the different sound speeds in different materials, the size, density, internal defects, and tissue changes of various materials can be measured. The phased array ultrasonic probe uses a composite chip array integrated with multiple chips to transmit, receive, and convert signals. It is different from the single chip probe used in conventional ultrasonic testing technology. It has the characteristics of flexible and controllable sound beam deflection and focusing, high sensitivity, and large amount of data information collection.

At present, when the phased array ultrasonic probe is used for thin-walled non-standard socket welds, it is impossible to detect the thin-walled non-standard socket welds on the casing side due to the thin wall thickness, casing structure and casing length. It can only be detected on the branch pipe side. The existing phased array ultrasonic defect detection capability of the weld joint is low due to the probe and wedge block, and the existing probe coupling curvature is large, resulting in the energy concentration position being far away, which is not suitable for thin-walled pipe detection.

Utility Model Content

The technical problem to be solved by the utility model is to provide a detection device for socket welding phased array ultrasonic detection of thin-walled non-standard pipe fittings.

The technical solution adopted by the utility model to solve the technical problem is: constructing a detection device for thin-walled non-standard pipe socket welding phased array ultrasonic detection, which includes a wedge and a probe, the probe is arranged on the wedge, and the array element array type of the probe is a self-focusing linear array;

The wedge angle ω of the wedge is 35° to 45°, the front length _L1 of the incident point of the wedge is 8mm to 9mm, the rear edge length _L2 of the incident point of the wedge is 9mm to 10mm, the wedge width _L3 of the wedge is 20mm to 25mm, the intra-wedge sound path _L4 of the wedge is 8mm to 9mm, and the self-coupling curvature of the probe is 26mm to 30mm.

In some embodiments, the wedge angle ω of the wedge is 39°, the front length _L1 of the incident point of the wedge is 8.43 mm, the rear edge length _L2 of the incident point of the wedge is 9.75 mm, the wedge width L3 of the wedge is 22 mm, the intra-wedge sound path _L4 of the wedge is 8.25 mm, and the self-coupling curvature of the probe is 28 mm.

In some embodiments, a positioning groove is provided on the wedge block, the probe is mounted on the positioning groove, the bottom surface of the positioning groove is configured as an inclined slope, and the inclination angle of the inclined slope is consistent with the wedge angle ω of the wedge block.

In some embodiments, the probe is bonded to the positioning groove or the probe is connected to the positioning groove via a fastener.

In some embodiments, the nominal frequency of the probe is 5Mhz.

In some embodiments, the minimum array element gap g of the probe is 0.1 mm, the minimum array element center distance p of the probe is 0.5 mm, and the minimum array element width e of the probe is 0.4 mm.

In some embodiments, the array element gap g of the probe is 0.1 mm, the array element center distance p of the probe is 0.6 mm, and the array element width e of the probe is 0.5 mm.

In some embodiments, the number of array elements of the probe is 12 to 16.

In some embodiments, the probe has 16 array elements.

In some embodiments, a probe housing for accommodating the wedge and the probe is also included.

In some embodiments, a probe housing for accommodating the wedge and the probe is also included.

The implementation of the utility model has the following beneficial effects: the detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings combines the thickness of the inspected component and the fan-shaped scanning angle, changes the curvature radius of the driven window of the phased array ultrasonic detection probe under the premise of ensuring the coverage of the sound beam, selects the array element array type of the probe as a self-focusing linear array under the premise of meeting the detection focal length, and complies with the equal-depth focusing law of the self-focusing probe. The detected area has a finer sound beam group, making the energy distribution more uniform, and a higher detection sensitivity can be obtained. The size of the wedge block is changed by design, so that the size specification of the wedge block becomes smaller than before, and a large-angle ultrasonic wave can be obtained, which more effectively covers the detection area.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

FIG1 is a schematic diagram of the front structure of a detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings;

FIG2 is a schematic diagram of the three-dimensional structure of a detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings;

3 is a front view of basic parameters of a linear array oblique probe of a detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings;

FIG. 4 is a top view of basic parameters of a linear array oblique probe of a detection device for phased array ultrasonic detection of socket welds of thin-walled non-standard pipe fittings.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Please refer to Figures 1 to 4. The utility model discloses a detection device for socket welding of thin-walled non-standard pipe fittings. The phased array ultrasonic detection system is mainly composed of a transducer array and a control unit. The transducer array elements are arranged according to certain rules and have independent receiving/transmitting control modules. When the transducer is in the transmitting state, the control unit controls the transmission delay time of each element of the transducer according to a certain delay rule, thereby controlling the focus and direction of the transmitted ultrasonic beam, and realizing the movement, deflection and focusing of the sound beam within a certain range. The transducer receiving process also follows the above-mentioned geometric focusing delay rule, which is a reciprocal process with the transmitting state of the transducer. During the detection, the sound beam propagates in the medium according to a certain rule. When the acoustic impedance at the defect in the medium changes, a reflection signal with a certain sound intensity is generated. The path from this point to each element in the transducer array is different, resulting in a certain difference in the time for the reflection signal generated at this point to reach each element. Each element delays and sums the echo signal according to the set delay amount Δt, so that the echo signal from the defect is in phase, achieving the purpose of enhancement and realizing receiving focusing.

The detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings specifically includes a wedge block 1 and a probe 2. The probe 2 is arranged on the wedge block 1. The array element array type of the probe 2 is a self-focusing linear array, and the probe 2 is a linear oblique probe.

Among them, since the thickness of the inspected workpiece is relatively thin, the sector scanning angle of the phased array ultrasonic detection is limited, so in the thin wall detection, a wedge 1 with a short front is designed to ensure the coverage of the sound beam. In this embodiment, as shown in FIG1, combined with the thickness of the inspected component and the sector scanning angle, the focal law selects sector scanning, as shown in FIG1 and FIG2, the left part (dashed line part) of FIG1 and FIG2 represents the deflection range of the sound velocity, the deflection range of the sound beam is a sector, α represents the sector angle, and the sector angle is 50° to 72°, and as shown in FIG1 and FIG3, the wedge angle ω of the wedge 1 is set to 35° to 45°, the front length L1 of the incident point of the wedge 1 is _8mm to 9mm, the rear edge length _L2 of the incident point of the wedge 1 is 9mm to 10mm, the wedge width _L3 of the wedge 1 is 20mm to 25mm, the wedge inner sound path _L4 of the wedge 1 is 8mm to 9mm, and the self-coupling curvature of the probe 2 is 26mm to 30mm. While the self-coupling curvature of probe 2 satisfies the requirement for sound beam penetration of the weld, a smaller phased array ultrasonic detection probe is designed, and the self-coupling curvature of the chip is adjusted from 32mm to 26mm to 30mm through process optimization, while cylindrical focusing and delay law are adopted.

As shown in FIG3 , point B in FIG3 is the incident point. Combined with FIG1 , the wedge angle ω of wedge 1 refers to the angle between the plane where probe 2 is located and the bottom surface of wedge 1. From geometric knowledge, it can be known that in the phased array oblique probe, the natural incident angle α of the array element combination is equal to the wedge angle ω. During the detection process, it should be noted that the wedge angle ω will change with the wear of probe 2, thereby affecting the incident point of the oblique probe. The front length _L1 of the incident point of the wedge 1 refers to the distance between the incident point in wedge 1 and the front edge of probe 2 at a natural angle. It should be noted that in phased array detection, the incident point of probe 2 will be offset under different focal laws. Therefore, when calibrating the front length of wedge 1, the focal law is generally not set, and the calibration is performed at the natural refraction angle. The rear edge length _L2 of the incident point of wedge 1 refers to the distance between the incident point in wedge 1 and the rear edge of probe 2 at a natural angle. _L3 in the figure is the wedge width, which refers to the length of the bottom surface of wedge 1 along the driven axis. The wedge inner acoustic path _L4 of the wedge block 1 refers to the length of the line between the array center of the probe 2 and the incident point at the natural incident angle, and the line _L4 is perpendicular to the array element of the probe 2. In addition, L refers to the wedge length, which refers to the length of the bottom surface of the wedge block 1 along the active axis.

It can be understood that the detection device for phased array ultrasonic detection of socket welds of thin-walled non-standard pipe fittings combines the thickness of the inspected component and the fan-shaped scanning angle, and changes the curvature radius of the driven window of the phased array ultrasonic detection probe while ensuring the coverage of the sound beam. On the premise of meeting the detection focal length, the array element array type of probe 2 is selected as a self-focusing linear array, and in accordance with the equal-depth focusing law of the self-focusing probe, the inspected area has a finer sound beam group, making the energy distribution more uniform, and obtaining a higher detection sensitivity. By changing the size of the wedge block 1 by design, the size of the wedge block 1 becomes smaller than before, and a large-angle ultrasonic wave can be obtained to more effectively cover the detection area.

Preferably, the wedge angle ω of the wedge 1 is 39°, the front length _L1 of the incident point of the wedge 1 is 8.43 mm, the rear edge length _L2 of the incident point of the wedge 1 is 9.75 mm, the wedge width _L3 of the wedge 1 is 22 mm, the wedge inner sound path _L4 of the wedge 1 is 8.25 mm, the self-coupling curvature of the probe 2 is 28 mm, and the material of the wedge 1 is polystyrene plastic.

As shown in Fig. 2, a positioning groove 11 is provided on the wedge block 1, and the probe 2 is installed on the positioning groove 11. The bottom surface of the positioning groove 11 is set as an inclined surface, and the inclination angle of the inclined surface is consistent with the wedge angle ω of the wedge block 1. For example, the inclination angle of the inclined surface can be preferably 39°, and the probe 2 is bonded to the positioning groove 11 or the probe 2 is connected to the positioning groove 11 by a fastener.

Among them, beam directivity is an important technical indicator of the probe, and its quality determines the propagation direction and energy concentration of the ultrasonic wave, and has an important impact on the detection capability. Since the probe 2 of the detection device has a small contact area and is compact, the number of array elements of the probe 2 is 12 to 16, and good beam directivity can be maintained, as shown in Figure 3. In addition, the minimum array element gap g of the probe 2 is 0.1mm, the minimum array element center distance p of the probe 2 is 0.5mm, and the minimum array element width e of the probe 2 is 0.4mm.

In order to make the phased array of probe 2 have better beam directivity and combined with the shape of the workpiece, in order to make the probe more compact, in this embodiment, the specifications of the phased array of probe 2 are as follows: the nominal frequency of probe 2 is 5Mhz, the array element gap g of probe 2 is 0.1mm, the array element center distance p of probe 2 is 0.6mm, the array element width e of probe 2 is 0.5mm, and the number of array elements of probe 2 is 16.

Among them, the detection device for phased array ultrasonic detection of socket welding of thin-walled non-standard pipe fittings also includes a probe housing for accommodating the wedge block 1 and the probe 2. The probe housing can be used to protect the wedge block 1 and the probe 2. The material of the probe housing is stainless steel or aluminum alloy.

It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims (10)

1. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting is characterized by comprising a wedge block (1) and a probe (2), wherein the probe (2) is arranged on the wedge block (1), and the array element array type of the probe (2) is a self-focusing linear array;

The wedge angle omega of the wedge block (1) is 35-45 degrees, the incidence point front edge length L ₁ of the wedge block (1) is 8-9 mm, the incidence point rear edge length L ₂ of the wedge block (1) is 9-10 mm, the wedge block width L ₃ of the wedge block (1) is 20-25 mm, the intra-wedge sound path L ₄ of the wedge block (1) is 8-9 mm, and the self-coupling curvature of the probe (2) is 26-30 mm.

2. The detection device for ultrasonic detection of a thin-wall non-standard pipe socket welding phased array according to claim 1, wherein a wedge angle ω of the wedge (1) is 39 °, an incident point leading edge length L ₁ of the wedge (1) is 8.43mm, an incident point trailing edge length L ₂ of the wedge (1) is 9.75mm, a wedge width L ₃ of the wedge (1) is 22mm, an intra-wedge sound path L ₄ of the wedge (1) is 8.25mm, and a self-coupling curvature of the probe (2) is 28mm.

3. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting according to claim 1, wherein a positioning groove (11) is formed in the wedge block (1), the probe (2) is installed on the positioning groove (11), the bottom surface of the positioning groove (11) is provided with an inclined plane, and the inclined angle of the inclined plane is consistent with the wedge block angle omega of the wedge block (1).

4. A detection device for ultrasonic detection of a socket welding phased array of thin-walled non-standard pipe fittings according to claim 3, characterized in that the probe (2) is adhesively connected with the positioning groove (11) or the probe (2) is connected with the positioning groove (11) by a fastener.

5. The detection device for ultrasonic detection of a thin-walled non-standard pipe socket welding phased array according to claim 1, characterized in that the nominal frequency of the probe (2) is 5Mhz.

6. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting according to claim 1, wherein the minimum array element gap g of the probe (2) is 0.1mm, the minimum array element center distance p of the probe (2) is 0.5mm, and the minimum array element width e of the probe (2) is 0.4mm.

7. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting according to claim 6, wherein an array element gap g of the probe (2) is 0.1mm, an array element center distance p of the probe (2) is 0.6mm, and an array element width e of the probe (2) is 0.5mm.

8. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting according to claim 1, wherein the number of array elements of the probe (2) is 12 to 16.

9. The detection device for ultrasonic detection of the socket welding phased array of the thin-wall non-standard pipe fitting according to claim 8, wherein the number of array elements of the probe (2) is 16.

10. The detection device for ultrasonic detection of a thin-walled non-standard pipe socket welding phased array according to claim 1, further comprising a probe housing for accommodating the wedge (1) and the probe (2).