CN217007139U - Curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipe - Google Patents
Curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipe Download PDFInfo
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- CN217007139U CN217007139U CN202122062014.4U CN202122062014U CN217007139U CN 217007139 U CN217007139 U CN 217007139U CN 202122062014 U CN202122062014 U CN 202122062014U CN 217007139 U CN217007139 U CN 217007139U
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Abstract
The utility model discloses a curved surface step calibration test block for ultrasonic thickness measurement of a small-diameter pipe, which comprises a base body with an arc-shaped cross section, wherein a plurality of arc-shaped steps with arc-shaped outer diameters from small to large are sequentially arranged on the outer ring of the base body along the length direction, the inner diameters of the arc-shaped steps are consistent, the arc-shaped outer diameters are arranged from small to large to form an arc-shaped step curved surface, and flat bottom holes and rectangular grooves are arranged at intervals on the inner arc surface of the arc-shaped step curved surface. The test block is simple in structure, convenient to manufacture, convenient to carry on site and carry out calibration operation, capable of calibrating the sound velocity of the pipe wall, capable of calibrating the detection blind area, and capable of improving the detection precision of the wall thickness of the small-diameter pipe by matching with the bicrystal and the curved surface probe.
Description
Technical Field
The utility model relates to the technical field of nondestructive testing, in particular to a curved surface step calibration test block for ultrasonic thickness measurement of a small-diameter pipe.
Background
In ultrasonic thickness measurement detection, the accuracy of material sound velocity verification determines the precision of thickness measurement data. At present, ultrasonic thickness gauges of a plurality of manufacturers and brands are arranged on the market, the ultrasonic thickness gauge is small in size, simple and convenient to operate, capable of automatically reading thickness measurement values and very convenient to use. However, the sound velocity calibration test blocks of the ultrasonic thickness gauge are all planar, the thickness measurement step test block given in the ultrasonic detection standard is also a planar step test block, a curved surface step test block which is used for sound velocity calibration and is consistent with a tubular shape in ultrasonic thickness measurement of a small-diameter tube is not provided, the coupling stability of the small-diameter tube in ultrasonic thickness measurement is poor, the ultrasonic thickness measurement has particularity for placement of an ultrasonic probe and acquisition of data, and in order to achieve a high-precision detection result, a small-curvature tubular test block matched with the small-diameter tube is required to be used for improving sound velocity calibration precision.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a curved surface step calibration test block for ultrasonic thickness measurement of a small-diameter pipe, which has the advantages of simple structure, convenience in manufacture, convenience in field carrying and calibration operation, capability of calibrating the sound velocity of the pipe wall, capability of calibrating a detection blind area, and capability of improving the detection precision of the wall thickness of the small-diameter pipe by matching with a bicrystal and a curved surface probe.
In order to solve the technical problem, the curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe comprises a base body with an arc-shaped cross section, a plurality of arc-shaped steps with arc-shaped outer diameters from small to large are sequentially arranged on the outer ring of the base body along the length direction, the inner diameters of the arc-shaped steps are consistent, the arc-shaped outer diameters are arranged from small to large to form an arc-shaped step curved surface, and flat-bottom holes and rectangular grooves are formed in the inner arc surface of the arc-shaped step curved surface at intervals.
Further, the arc of the base body cross section is semicircular.
Further, the length of the arc steps is larger than the diameter of the ultrasonic thickness measuring probe.
Further, the difference between the adjacent wall thicknesses of the arc steps is 1 mm.
Further, the flat bottom hole and the rectangular groove are respectively arranged at the center and the end part of the inner arc surface of the arc step with the largest outer diameter in the plurality of arc steps.
Further, the diameter and the depth of the flat bottom hole are respectively 2mm, the length of the rectangular groove is 5mm, and the groove depth and the groove width are respectively 1 mm.
The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe adopts the technical scheme, namely the test block comprises a base body with an arc-shaped cross section, a plurality of arc-shaped steps with arc-shaped outer diameters from small to large are sequentially arranged on the outer ring of the base body along the length direction, the inner diameters of the arc-shaped steps are consistent, the arc-shaped outer diameters are arranged from small to large to form an arc-shaped step curved surface, and flat bottom holes and rectangular grooves are arranged at intervals on the inner arc surface of the arc-shaped step curved surface. The test block is simple in structure, convenient to manufacture, convenient to carry on site and carry out calibration operation, capable of calibrating the sound velocity of the pipe wall, capable of calibrating the detection blind area, and capable of improving the detection precision of the wall thickness of the small-diameter pipe by matching with the bicrystal and the curved surface probe.
Drawings
The utility model is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic diagram of a curved surface step calibration test block for ultrasonic thickness measurement of a small-diameter pipe according to the present invention;
FIG. 2 is a schematic cross-sectional view of the test block;
FIG. 3 is a schematic view of the test block with a flat bottom hole and a rectangular groove;
FIG. 4 is a schematic cross-sectional view of a flat bottom hole in the test block;
FIG. 5 is a schematic cross-sectional view of a rectangular groove in the test block.
Detailed Description
The embodiment of the utility model is shown in fig. 1, fig. 2 and fig. 3, and the curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipes comprises a base body 1 with an arc-shaped cross section, wherein a plurality of arc-shaped steps 11 with arc-shaped outer diameters from small to large are sequentially arranged on the outer ring of the base body 1 along the length direction, the inner diameters of the plurality of arc-shaped steps 11 are consistent, the arc-shaped outer diameters are arranged from small to large to form an arc-shaped step curved surface, and flat-bottom holes 12 and rectangular grooves 13 are arranged on the inner arc surface of the arc-shaped step curved surface at intervals.
Preferably, the arc shape of the cross section of the substrate 1 is a semicircle.
Preferably, the length of the arc steps 11 is greater than the diameter of the ultrasonic thickness measuring probe. To facilitate stability of ultrasound probe placement and good contact coupling.
Preferably, the difference between the adjacent wall thicknesses of the plurality of arc-shaped steps 11 is 1 mm.
As shown in fig. 4 and 5, preferably, the flat bottom hole 12 and the rectangular groove 13 are respectively opened at the center and the end of the intrados of the largest outer diameter arc step among the plurality of arc steps 11.
Preferably, the diameter and the depth of the flat bottom hole 12 are respectively 2mm, the length of the rectangular groove 13 is 5mm, and the groove depth and the groove width are respectively 1 mm. The flat-bottom hole simulates corrosion of a point, and the rectangular groove simulates a groove formed by fluid scouring and is used for verifying thickness measurement sensitivity respectively.
The test block can be made of a small-diameter metal seamless tube, and the material of the test block is selected according to the detected tube material. Cutting a section of seamless pipe with the inner diameter d and the length L from the central axis, and then processing the outer ring into an arc-shaped stepped curved surface; or the arc-shaped stepped curved surfaces of all sections of the seamless pipe can be symmetrically split from the central axis after being processed; and the wall thickness of the pipe wall of each arc-shaped step curved surface is sequentially processed into the pipe wall thickness difference of the adjacent arc-shaped step curved surfaces which is 1mm, and then a flat bottom hole and a rectangular groove are processed on the inner arc surface of the arc-shaped step curved surface with the maximum outer diameter D.
In actual detection, the test block is attached to the outer ring of the detected tube, an arc-shaped step curved surface close to the outer ring of the detected tube is selected according to the curvature of the outer ring of the detected tube, the ultrasonic probe is arranged on the arc-shaped step curved surface to detect the wall thickness of the detected tube, the curvature of the arc-shaped step curved surface is close to that of the outer ring of the detected tube, good coupling stability can be achieved, the most accurate checking precision can be achieved, and the precision of ultrasonic thickness measurement of the small-diameter tube is improved.
Claims (6)
1. The utility model provides a curved surface ladder check-up test block that is used for path pipe supersound thickness measurement which characterized in that: this test block includes that the cross-section is curved base member, the base member outer lane is equipped with a plurality of arc steps of arc external diameter from little to big along length direction in proper order, the internal diameter of a plurality of arc steps is unanimous, the arc external diameter is arranged from little to big and is formed arc ladder curved surface, the intrados interval of arc ladder curved surface is equipped with flat hole and rectangular channel.
2. The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe according to claim 1, wherein: the arc of the base body cross section is semicircular.
3. The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter tube according to claim 1 or 2, wherein: the lengths of the arc steps are larger than the diameter of the ultrasonic thickness measuring probe.
4. The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe according to claim 3, wherein: the difference between the adjacent wall thicknesses of the arc steps is 1 mm.
5. The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe according to claim 3, wherein: the flat bottom hole and the rectangular groove are respectively arranged at the center and the end part of the inner arc surface of the arc step with the largest outer diameter in the plurality of arc steps.
6. The curved surface step calibration test block for ultrasonic thickness measurement of the small-diameter pipe according to claim 5, wherein: the diameter and the degree of depth of flat bottom hole are 2mm respectively, the length of rectangular channel is 5mm, the groove depth and the groove width are 1mm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122062014.4U CN217007139U (en) | 2021-08-30 | 2021-08-30 | Curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122062014.4U CN217007139U (en) | 2021-08-30 | 2021-08-30 | Curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217007139U true CN217007139U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122062014.4U Active CN217007139U (en) | 2021-08-30 | 2021-08-30 | Curved surface step calibration test block for ultrasonic thickness measurement of small-diameter pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217007139U (en) |
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2021
- 2021-08-30 CN CN202122062014.4U patent/CN217007139U/en active Active
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