Reference block for pipes of ultrasonic automatic detection system
By designing a comparison test block of an ultrasonic automatic detection system that matches the material and structure of the pipe, the problem of insufficient automation and lack of accuracy in the existing technology is solved, and the rapid and accurate detection of the surface and internal defects of the pipe are achieved.
Patent Information
- Application Number
- CN202421669544.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-15
AI Technical Summary
When detecting defects on the surface and internal defects of the prior art, it is necessary to manually design the comparison test block, resulting in the detection process being not automated enough and lacking accuracy.
A comparison test block for pipes of ultrasonic automatic detection system is designed. The test block is taken from the pipe body and has the same wall thickness, material, heat treatment state, surface state and electromagnetic properties. Specific grooves, holes and V-shaped grooves are provided on the test block to simulate defects in the pipe.
By using this comparison test block, the ultrasonic detection probe can automatically scan the surface of the test block, covering 100% of artificial defects, improving detection efficiency and accuracy, and meeting the needs of automatic ultrasonic detection of pipes.
Smart Images
Figure CN222913578U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automatic line systems for ultrasonic detection of metal materials, and specifically relates to a comparative test block for pipes of an automatic ultrasonic detection system for detecting defects such as cracks, pores, folds, delamination and the like on the surface and inside of pipes. Background Art
[0002] There are defects such as cracks, pores, folds, delamination, inclusions, etc. on the surface and inside of the pipe. For such defects, ultrasonic testing requires the use of a comparison test block made by machining a flat-bottomed hole, through hole or groove on the workpiece as an artificial defect. It is necessary to design a comparison test block for ultrasonic automatic testing of pipes. Utility Model Content
[0003] The utility model aims to provide a comparison test block for pipes in an ultrasonic automatic detection system for automatically detecting defects such as cracks, pores, folds, delamination, inclusions, etc. in pipes, so as to ensure the accuracy of ultrasonic detection.
[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a comparison test block for pipes in an ultrasonic automatic detection system, the comparison test block is made of the pipe body, and has the same wall thickness, the same material, the same heat treatment state, the same surface state and electromagnetic properties as the pipe body. The comparison test block is a hollow cylinder with the same outer diameter and inner diameter as the pipe body and a length ≥200mm, and the wall thickness is T. The surface roughness of the outer circle of the comparison test block is Ra≤6.3μm, and the surface roughness of the inner wall is Ra≤6.3μm; the surface roughness of the two end faces is Ra≤6.3μm; two radially evenly distributed longitudinal grooves are respectively arranged at the inner and outer walls ≥20mm away from the left end face of the hollow cylinder, the longitudinal groove size is 25mm×0.15mm×0.25mm, and the longitudinal groove is parallel to the axis of the cylinder; in the diameter direction of the left end face of the hollow cylinder passing through the center of the circle, 1 / 4T, At 1 / 2Tmm, two Φ2mm×40mm flat-bottom holes with the center line parallel to the axis of the cylinder are symmetrically set; at ≥50mm from the left end face of the hollow cylinder and 1 / 2Tmm from the surface of the cylinder, a Φ2mm first transverse through hole with a direction perpendicular to the axis of the cylinder is set; at ≥50mm from the left end face of the hollow cylinder and 1 / 4T from the surface of the cylinder, a Φ2mm second transverse through hole with a direction perpendicular to the axis of the cylinder is set; the position deviation of the two transverse through holes should be ±0.25mm; at the inner wall ≥50mm from the right end face of the hollow cylinder, an inner wall V-shaped groove is opened, and the angle of the inner wall V-shaped groove is 60 0 , the depth is 0.5mm, the arc length of the inner wall V-shaped groove is 25mm; corresponding to this V-shaped groove, an outer wall V-shaped groove is opened at a distance of ≥80mm from the right end face of the outer wall of the hollow cylinder, and the angle of the outer wall V-shaped groove is 60 0, with a depth of 0.5 mm and an arc length of 25 mm for the V-shaped groove on the outer wall; at a position ≥ 100 mm from the right end face of the hollow cylinder on the inner wall, 3 flat-bottomed holes with a diameter of Φ2 mm are provided. The spacing between the 3 flat-bottomed holes is 25 mm, and the depths of the flat-bottomed holes are 1 / 4T, 1 / 2T, and 3 / 4T in sequence. The center lines of the flat-bottomed holes pass through the radius of the hollow cylinder and are parallel to each other. The diameter tolerance of the flat-bottomed holes is ±0.01 mm or ±1% of the hole diameter, taking the larger value; the flatness error of the hole bottom should not exceed ±0.03 mm, and the surface roughness Ra of all holes is not greater than 3.2 μm; T is the wall thickness of the hollow cylinder.
[0005] The beneficial effects of the present utility model are as follows: When using ultrasonic testing on this reference block 1, the ultrasonic testing probes (straight probes and inclined probes) perform a spiral scanning motion on the outer surface of the block, covering 100% of the artificial defects on the sample block. The detection distance and detection sensitivity are adjusted using artificial reflectors, and the display signals of the inner and outer surfaces and internal reflectors shown on the fluorescence screen of the ultrasonic detector are adjusted to the reference wave height, and the alarm area is set, meeting the requirements of automatic ultrasonic testing for pipes.
[0006] In ultrasonic testing of pipes, if no detected defect signal exceeds the alarm level, it can be considered that the ultrasonic testing of the pipe surface and internal part is qualified. Its advantage is that it can quickly judge the defect echo, improving the detection efficiency and the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic structural diagram of the reference block of the present utility model.
[0008] Figure 2 It is a sectional view of the flat-bottomed holes, transverse through-holes, and V-shaped grooves of the reference block of the present utility model.
[0009] Figure 3 It is a sectional view of the longitudinal groove of the reference block of the present utility model.
[0010] As shown in the figure: 1. Reference block, 2. Longitudinal groove, 3. Flat-bottomed hole, 4. First transverse through-hole, 5. Second transverse through-hole, 6. V-shaped groove on the outer wall, 7. V-shaped groove on the inner wall, 8. Flat-bottomed hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0011] Embodiment 1: As shown in Figure 1 、 2 、3, an ultrasonic automatic detection reference block for pipes. The reference block 1 is made from the pipe body and has the same wall thickness, the same material, the same heat treatment state, surface state, and electromagnetic properties as the body; the reference block is a hollow cylinder with the same outer diameter, inner diameter as the pipe, and a length ≥ 200 mm, with a wall thickness of T. The surface roughness Ra of the outer circle of the reference block is ≤ 6.3 μm; the surface roughness Ra of the inner wall is ≤ 6.3 μm; the surface roughness Ra of both end faces is ≤ 6.3 μm.
[0012] As Figure 1 shown, at the inner and outer walls of the hollow cylinder ≥20 mm away from the left end face, two longitudinally distributed longitudinal grooves 2 are respectively provided, and the size of the longitudinal groove 2 is 25 mm × 0.15 mm × 0.25 mm, and the longitudinal groove 2 is parallel to the axis of the cylinder.
[0013] As Figure 1 、 2 shown, in the diametrical direction passing through the center of the left end face of the hollow cylinder, at 1 / 4T and 1 / 2T mm away from the cylinder surface, two flat-bottomed holes 3 with a diameter of Φ2 mm × 40 mm and a center line parallel to the axis of the cylinder are symmetrically provided. At a position ≥50 mm away from the left end face of the hollow cylinder and at 1 / 2T mm away from the cylinder surface, a first transverse through-hole 4 with a diameter of Φ2 mm perpendicular to the axis of the cylinder is provided; at a position ≥50 mm away from the left end face of the hollow cylinder and at 1 / 4T away from the cylinder surface, a second transverse through-hole 5 with a diameter of Φ2 mm perpendicular to the axis of the cylinder is provided; the position deviation between the two transverse through-holes should be ±0.25 mm. At the inner wall ≥50 mm away from the right end face of the hollow cylinder, an inner wall V-shaped groove 7 is provided, and the angle of the inner wall V-shaped groove is 60 0 with a depth of 0.5 mm and an arc length of the inner wall V-shaped groove of 25 mm; correspondingly, at the outer wall ≥80 mm away from the right end face of the hollow cylinder, an outer wall V-shaped groove 6 is provided, and the angle of the outer wall V-shaped groove is 60 0 , with a depth of 0.5 mm and an arc length of the outer wall V-shaped groove of 25 mm; at the inner wall ≥100 mm away from the right end face of the hollow cylinder, three flat-bottomed holes 8 with a diameter of Φ2 mm are provided, and the spacing between the three flat-bottomed holes is 25 mm. The depths of the flat-bottomed holes are 1 / 4T, 1 / 2T, and 3 / 4T of the flat-bottomed holes in sequence. The center lines of the flat-bottomed holes pass through the radius of the hollow cylinder and are parallel to each other. The diameter tolerance of the flat-bottomed holes is ±0.01 mm or ±1% of the hole diameter, taking the larger value; the flatness error of the hole bottom should not exceed ±0.03 mm, and the surface roughness (Ra) of all holes should not be greater than 3.2 μm; T is the wall thickness of the hollow cylinder.
[0014] This reference test block 1 is detected by ultrasonic waves. The ultrasonic detection probe (straight probe and inclined probe) makes a spiral scanning movement on the outer surface of the test block to cover 100% of the artificial defects of the sample test block. The detection distance and detection sensitivity are adjusted by using the artificial reflector, and the display signals of the inner and outer surfaces and the internal reflector shown on the fluorescence screen of the ultrasonic detector are adjusted to the reference wave height, and the alarm area is set, which meets the requirements of automatic ultrasonic detection of pipes.
Claims
1. A comparison test block for pipes in an ultrasonic automatic testing system, characterized in that: The comparison test block (1) is made from the pipe body and has the same wall thickness, material, heat treatment status, surface status and electromagnetic properties as the pipe body. The comparison test block is a hollow cylinder with the same outer diameter and inner diameter as the workpiece and a length of ≥200 mm. The wall thickness is T. The surface roughness of the outer circle of the comparison test block is Ra≤6.3μm; the surface roughness of the inner wall is Ra≤6.3μm; and the surface roughness of both end faces is Ra≤6.3μm. Two radially evenly distributed longitudinal grooves (2) are respectively provided on the inner and outer walls of the hollow cylinder at a distance of ≥20 mm from the left end face, the size of the longitudinal grooves (2) being 25 mm×0.15 mm×0.25 mm, and the longitudinal grooves (2) being parallel to the axis of the cylinder; two Φ2 mm×40 mm flat-bottom holes (3) having a center line parallel to the axis of the hollow cylinder are symmetrically provided at 1 / 4T and 1 / 2T mm from the surface of the hollow cylinder in the diameter direction passing through the center of the circle; and the left end face of the hollow cylinder is symmetrically provided with a center line parallel to the axis of the hollow cylinder. ≥50mm, 1 / 2Tmm from the surface of the cylinder, a Φ2mm first transverse through hole (4) is opened in a direction perpendicular to the axis of the hollow cylinder; ≥50mm from the left end face of the hollow cylinder, 1 / 4T from the surface of the hollow cylinder, a Φ2mm second transverse through hole (5) is opened in a direction perpendicular to the axis of the hollow cylinder; the position deviation of the two transverse through holes should be ±0.25mm; ≥50mm from the inner wall of the right end face of the hollow cylinder, an inner wall V-shaped groove (7) is opened, and the angle of the inner wall V-shaped groove is 60 0 The depth is 0.5mm, and the arc length of the inner wall V-shaped groove is 25mm; corresponding to this V-shaped groove, an outer wall V-shaped groove (6) is opened at a position ≥80mm from the right end face of the outer wall of the hollow cylinder, and the angle of the outer wall V-shaped groove is 60 0 , the depth is 0.5mm, and the arc length of the V-shaped groove on the outer wall is 25mm; three Φ2mm flat-bottom holes (8) are opened on the inner wall ≥100mm from the right end face of the hollow cylinder, the spacing between the three flat-bottom holes is 25mm, the depths of the flat-bottom holes are 1 / 4T, 1 / 2T, and 3 / 4T respectively, the center lines of the flat-bottom holes pass through the radius of the hollow cylinder and are parallel to each other, the diameter tolerance of the flat-bottom holes is ±0.01mm or ±1% of the hole diameter, whichever is greater; the flatness error of the hole bottom should not exceed ±0.03mm, and the surface roughness Ra of all holes is not greater than 3.2μm; T is the wall thickness of the hollow cylinder.