CN214223979U - Calibration test block for pulse eddy current detection - Google Patents
Calibration test block for pulse eddy current detection Download PDFInfo
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- CN214223979U CN214223979U CN202120325396.2U CN202120325396U CN214223979U CN 214223979 U CN214223979 U CN 214223979U CN 202120325396 U CN202120325396 U CN 202120325396U CN 214223979 U CN214223979 U CN 214223979U
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Abstract
The utility model provides a calibration test block of pulse eddy current testing, calibration test block be a plurality of concentric with high and pile up integrative semicylinder tubular product test block, the internal diameter of each semicylinder tubular product test block, wall thickness by last to increase progressively respectively down, all are equipped with the simulation defect hole on every tubular product test block lateral wall. The utility model has the advantages that: the structure is dexterous, and convenient to use can carry out the calibration of detection curve through the calibration test block before pulse eddy current testing for only need call the curve of timing in advance when formal detection can carry out on-the-spot inspection.
Description
Technical Field
The utility model relates to a special equipment detects technical field, concretely relates to pulse eddy current testing's calibration test block.
Background
The wall thickness detection data of special equipment such as pressure vessels, pressure pipelines and the like is an important basis for judging the health condition of the special equipment by special equipment detection personnel, and is also an essential detection method for detecting the special equipment.
At present, a thickness measuring device commonly used for the special equipment is a piezoelectric ultrasonic thickness gauge, but the equipment of the type usually needs smooth and pollution-free equipment surface, so that inconvenience is brought to detection. With the development of the pulse eddy current testing technology, the ultrasonic thickness measuring equipment based on the pulse eddy current principle is beginning to be applied to the special equipment inspection and detection. Although the common pulse electromagnetic ultrasonic thickness measuring equipment has low requirements on the detection surface of the equipment and brings great convenience to the equipment detection, the equipment with a heat insulation layer in petrochemical enterprises cannot be stopped for inspection due to condition limitation, and the common pulse electromagnetic ultrasonic detection is not convenient.
The pulse eddy current detection technology can realize the detection of the equipment under the condition that the insulating layer has the highest length of 300mm, and brings great convenience for online detection. However, in the field of inspection, for the pressure pipeline with the insulating layer, the diameter change, the thickness change and the thickness of the insulating layer are different, so that the calibration curves in the pulse eddy current inspection are different, and in the field inspection, the diameter, the wall thickness and the insulating layer state of the equipment can be known only by looking up the equipment data, or the bare pipes with the same diameter are found in the field for curve calibration, so that certain errors exist in the thickness measurement data, and in addition, the bare pipes with the same diameter and thickness are difficult to find for calibration in the field calibration, especially in the same device, the bare pipes with the same diameter and thickness are difficult to find, which brings great inconvenience to the pulse eddy current inspection.
Disclosure of Invention
The utility model aims at providing a structure is dexterous, convenient to use, the pulse eddy current who can calibrate detection curve detects calibration test block.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a calibration test block of pulse eddy current testing, the calibration test block be a plurality of with high and pile up integrative semicylindrical tubular product test block with one heart, the internal diameter, the wall thickness of each semicylindrical tubular product test block increase progressively respectively from top to bottom, all are equipped with the simulation and lack the hole on every tubular product test block lateral wall.
Furthermore, two sides of each pipe test block are respectively provided with simulated defect holes with different depths, the two simulated defect holes form an included angle relative to the center of the pipe, and the included angle is 30 ︒ -60 ︒.
Further, the simulated defect hole is located at the center height of the pipe test block.
Further, the simulated defect hole is a simulated corrosion pit or a simulated pitting pit.
Compared with the prior art, the utility model, have following advantage:
the utility model relates to a calibration test block of pulse eddy current testing, the structure is dexterous, and convenient to use can detect the curve calibration through the calibration test block before pulse eddy current testing for only need call the curve of timing in advance when formal detection and can carry out the on-the-spot inspection.
The utility model discloses the calibration test block has the tubular product test block of the different thickness of a plurality of, can proofread and correct the pipeline calibration curve of different wall thicknesses under the same pipe diameter for when detecting the pipeline under this pipe diameter, only need call corresponding calibration curve parameter can.
The utility model discloses every tubular product test block both sides of calibration test block are equipped with the simulation corrosion pit of the different degree of depth, can carry out further verification to the curve that has calibrated.
The utility model discloses the calibration test block adopts semicylinder tubular product, helps observing curve calibration and verification.
Drawings
Fig. 1 is a front view of an embodiment 1 of a calibration block for pulsed eddy current testing according to the present invention.
Fig. 2 is a bottom view of an embodiment 1 of a calibration block for pulsed eddy current testing according to the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The utility model provides a calibration test block of pulse eddy current testing, the calibration test block be a plurality of with high and pile up integrative semicylindrical tubular product test block with one heart, the internal diameter, the wall thickness of each semicylindrical tubular product test block increase progressively respectively from top to bottom, all are equipped with the simulation and lack the hole on every tubular product test block lateral wall. The simulation defect holes are located at the center height of the pipe test block, the simulation defect holes are simulation corrosion pits or simulation pitting pits, and the two simulation defect holes form an included angle relative to the center of the pipe.
Example 1
A20 # steel material, a nominal 200mm pipe material and an outer diameter 219mm are taken as examples. As shown in fig. 1 and 2, the calibration block of the present embodiment is four concentric semi-cylindrical tube blocks with the same height and stacked integrally, the height of each semi-cylindrical tube block is 300mm, that is, the total height of the calibration block is 1200mm, the inner diameter of each semi-cylindrical tube block is 179mm, 189mm, 199mm, 209mm from top to bottom, and the wall thickness of each semi-cylindrical tube block is 20mm, 15mm, 10mm, 5mm from top to bottom. The pipe cutting opening and the pipe circle center are taken as references, square simulated defect holes with the side length of 3mm are respectively cut on two sides of each pipe test block, the depths of the two simulated defect holes are different and are respectively 1mm and 2mm, and the two simulated defect holes are 45 ︒ relative to the pipe circle center.
Before using pulse eddy current inspection equipment to nominal 200mm, external diameter 219mm, adopting the pipeline under pressure of 20 # steel to detect, place the probe the utility model discloses the flawless department of calibration test block one of them tubular product test block, put the heat preservation structure of different thickness through the simulation pad and carry out the curve calibration, to the known diameter of waiting to detect pipeline, thickness and heat preservation thickness, accessible timing obtains more accurate calibration curve; and verifying the defective parts on two sides of the same pipe test block, and correspondingly naming and marking the calibration curve data. To the curve of the different wall thicknesses of the same pipe diameter of calibration, can the utility model discloses timing on the test block of other tubular products of calibration test block or other specifications.
The utility model discloses with four tubular product test blocks of calibration test block equidistribution, design under the condition of the conventional detection pipeline of comprehensive consideration, also can be with calibration test block equidistribution more or less tubular product test block.
In the national standard specification, the outer diameters of the pipe diameters under the same nominal scale are only one or more of the same, and the calibration curves with different thicknesses are adjusted under the same pipe diameter, so that the pipe diameters of the pipelines with different thicknesses under the same pipe diameter are adapted.
The utility model discloses under technical scheme's the thought guidance, the calibration test block of different thickness under the different pipe diameters can be set up to technical field technical personnel, and length, thickness and the position in simulation defect hole to each tubular product test block that constitutes the calibration test block all can change in a flexible way, also can further warp etc. to the type in simulation defect hole.
The utility model discloses a calibration test block still can be plate structure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.
Claims (4)
1. A calibration block for pulsed eddy current testing, comprising: the calibration test block is a plurality of concentric semi-cylindrical pipe test blocks which are at the same height and stacked into a whole, the inner diameter and the wall thickness of each semi-cylindrical pipe test block are sequentially increased from top to bottom, and a simulation defect hole is formed in the side wall of each pipe test block.
2. The calibration block for pulsed eddy current testing as set forth in claim 1, wherein: the two sides of each pipe test block are respectively provided with simulated defect holes with different depths, and the two simulated defect holes form an included angle relative to the center of the pipe, wherein the included angle is 30 ︒ -60 ︒.
3. The calibration block for pulsed eddy current testing as set forth in claim 2, wherein: the simulated defect hole is positioned at the central height of the pipe test block.
4. A calibration block for pulsed eddy current testing according to claim 2 or 3, wherein: the simulated defect hole is a simulated corrosion pit or a simulated pitting pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120325396.2U CN214223979U (en) | 2021-02-05 | 2021-02-05 | Calibration test block for pulse eddy current detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120325396.2U CN214223979U (en) | 2021-02-05 | 2021-02-05 | Calibration test block for pulse eddy current detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214223979U true CN214223979U (en) | 2021-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120325396.2U Active CN214223979U (en) | 2021-02-05 | 2021-02-05 | Calibration test block for pulse eddy current detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214223979U (en) |
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2021
- 2021-02-05 CN CN202120325396.2U patent/CN214223979U/en active Active
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