CN211318311U - Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler - Google Patents
Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler Download PDFInfo
- Publication number
- CN211318311U CN211318311U CN201922424312.6U CN201922424312U CN211318311U CN 211318311 U CN211318311 U CN 211318311U CN 201922424312 U CN201922424312 U CN 201922424312U CN 211318311 U CN211318311 U CN 211318311U
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- boiler
- resistant steel
- steel pipe
- intergranular corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an ultrasonic testing device for intergranular corrosion of austenitic heat-resistant steel pipe of a boiler, which comprises a container, a high-frequency longitudinal wave probe, an ultrasonic wedge block, an ultrasonic pulse generator and an oscilloscope; the device can detect the intergranular corrosion degree of the austenitic heat-resistant steel pipe of the boiler, has high detection efficiency, can reflect the state of in-service equipment, and has the detection sensitivity of intergranular corrosion depth reaching the grain level size.
Description
Technical Field
The utility model belongs to the technical field of the intergranular corrosion ultrasonic testing of heat-resisting steel pipe of boiler austenite, a intergranular corrosion ultrasonic testing device of heat-resisting steel pipe of boiler austenite is related to.
Background
At the present stage, the intergranular corrosion degree of the austenitic heat-resistant steel pipe of the boiler is only detected by using a metallographic technique, the metallographic detection period is long, and the samples can be destroyed and sampled only at the corresponding positions of the austenitic heat-resistant steel pipe for two-dimensional observation, so that the state of equipment in service cannot be comprehensively reflected.
In order to improve the detection efficiency without damaging the material structure and fully reflect the state of in-service equipment, a detection technology is needed, the technology can detect the intergranular corrosion degree of the austenitic heat-resistant steel pipe of the boiler, can provide technical support for safe operation and efficient supervision and management of the austenitic heat-resistant steel pipe of the boiler, and can also provide technical reference for service life evaluation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a boiler austenite heat-resisting steel pipe intergranular corrosion ultrasonic testing device, the device can realize detecting the intergranular corrosion degree of boiler austenite heat-resisting steel pipe, and detection efficiency is high, can reflect the state at labour's equipment simultaneously, and the detectivity of intergranular corrosion depth can reach crystal grain level size.
In order to achieve the purpose, the ultrasonic detection device for the intergranular corrosion of the austenitic heat-resistant steel pipe of the boiler comprises a container, a high-frequency longitudinal wave probe, an ultrasonic wedge block, an ultrasonic pulse generator and an oscilloscope;
medium water is filled in the container, the high-frequency longitudinal wave probe, the austenite heat-resistant steel pipe of the boiler to be tested and the ultrasonic wedge block are immersed in the medium water, the ultrasonic wedge block is positioned on the outer wall of the austenite heat-resistant steel pipe of the boiler to be tested, the high-frequency longitudinal wave probe is positioned on the ultrasonic wedge block, and the high-frequency longitudinal wave probe is connected with the ultrasonic pulse generator and the oscilloscope.
The high-frequency longitudinal wave probe is a 15MHz high-frequency longitudinal wave probe.
The high-frequency longitudinal wave probe is connected with the ultrasonic pulse generator and the oscilloscope through a cable.
The utility model discloses following beneficial effect has:
when the ultrasonic detection device for the intergranular corrosion of the austenitic heat-resistant steel pipe of the boiler is operated specifically, the intergranular corrosion of the austenitic heat-resistant steel pipe of the boiler is detected by adopting a high-frequency ultrasonic detection technology, so that the detection sensitivity of the intergranular corrosion depth can reach the grain size, the ultrasonic longitudinal wave is transmitted to the pipe wall of the austenitic heat-resistant steel pipe of the boiler to be tested through the ultrasonic wedge block and the medium water, when intergranular corrosion exists in the pipe wall of the austenitic heat-resistant steel pipe of the boiler to be tested, the ultrasonic longitudinal wave passes through intergranular corrosion in the pipe wall of the austenitic heat-resistant steel pipe of the boiler to be measured to reach the bottom surface and then generates pulse echo, and then, an oscilloscope is used for displaying, and pulse echoes displayed by the oscilloscope are used for analyzing the intercrystalline corrosion degree in the tube wall of the austenitic heat-resistant steel tube of the boiler to be detected, so that the operation is convenient and simple, the detection efficiency is high, and the state of in-service equipment can be reflected. In addition, the high-frequency longitudinal wave probe, the austenitic heat-resistant steel pipe of the boiler to be detected and the ultrasonic wedge block are all immersed in the medium water, the amplitude of the pulse echo is not influenced by the magnitude of external force applied to the high-frequency longitudinal wave probe, and the detection precision is high.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a diagram of an echo waveform of an ultrasonic detection pulse without intergranular corrosion;
FIG. 3 is a diagram of an echo waveform of an ultrasonic detection pulse in the presence of intergranular corrosion.
FIG. 4 is a graph of intergranular corrosion texture morphology discovered using metallographic methods to verify ultrasonic testing.
Wherein, 1 is a container 1, 2 is medium water 2, 3 is a boiler austenite heat-resisting steel pipe to be tested 3, 4 is an oscilloscope 4, 5 is a high-frequency longitudinal wave probe 5, 6 is an ultrasonic wedge 6, 7 is a probe wafer 7, 8 is a cable 8, 9 is an ultrasonic pulse generator 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the ultrasonic testing apparatus for detecting the intergranular corrosion of the austenitic heat-resistant steel tube of the boiler of the present invention includes a container 1, a high-frequency longitudinal wave probe 5, an ultrasonic wedge 6, an ultrasonic pulse generator 9 and an oscilloscope 4; the container 1 is filled with medium water 2, a high-frequency longitudinal wave probe 5, a boiler austenite heat-resistant steel pipe 3 to be detected and an ultrasonic wedge 6 are immersed in the medium water 2, the ultrasonic wedge 6 is positioned on the outer wall of the boiler austenite heat-resistant steel pipe 3 to be detected, the high-frequency longitudinal wave probe 5 is positioned on the ultrasonic wedge 6, and the high-frequency longitudinal wave probe 5 is connected with an ultrasonic pulse generator 9 and an oscilloscope 4.
It should be noted that the high-frequency longitudinal wave probe 5 is a 15MHz high-frequency longitudinal wave probe; the high-frequency longitudinal wave probe 5 is connected with an ultrasonic pulse generator 9 and the oscilloscope 4 through a cable 8.
The utility model discloses a concrete working process does:
sending high-frequency pulse voltage sent by an ultrasonic pulse generator 9 into a high-frequency longitudinal wave probe 5 to enable a probe wafer 7 in the high-frequency longitudinal wave probe 5 to generate ultrasonic longitudinal waves with the frequency of 15MHz, transmitting the ultrasonic longitudinal waves to the pipe wall of a boiler austenite heat-resistant steel pipe 3 to be detected after passing through an ultrasonic wedge 6 and medium water 2, generating pulse echoes after the ultrasonic longitudinal waves penetrate through intercrystalline corrosion in the pipe wall of the boiler austenite heat-resistant steel pipe 3 to be detected and reach the bottom surface when the intercrystalline corrosion exists in the pipe wall of the boiler austenite heat-resistant steel pipe 3 to be detected, then sending the pulse echoes into an oscilloscope 4 for displaying after being received by the high-frequency longitudinal wave probe 5, and analyzing the intercrystalline corrosion degree according to the waveform of the pulse echoes displayed in the oscilloscope 4, wherein the displayed pulse echoes are shown in a graph 3; as shown in fig. 2, when there is no intergranular corrosion in the tube wall of the austenitic heat-resistant steel tube 3 of the boiler to be measured, the ultrasonic detection shows that the primary wave and the secondary wave are very obvious, and the wave amplitude is also high. As shown in fig. 3, when intergranular corrosion exists in the boiler austenite heat-resistant steel pipe 3 to be detected, the primary wave shown by ultrasonic detection is relatively unobvious, the amplitude of the wave is relatively low, the secondary wave disappears, the intergranular corrosion degree of the boiler austenite heat-resistant steel pipe 3 to be detected, which is found by ultrasonic detection, needs to be further verified by using a metallographic method, the intergranular corrosion structure morphology obtained by the metallographic method is shown in fig. 4, and the result shows that the intergranular corrosion depth found by ultrasonic detection in fig. 3 is 3 austenite grain sizes.
Claims (3)
1. An ultrasonic detection device for intergranular corrosion of a boiler austenitic heat-resistant steel pipe is characterized by comprising a container (1), a high-frequency longitudinal wave probe (5), an ultrasonic wedge block (6), an ultrasonic pulse generator (9) and an oscilloscope (4);
the high-frequency longitudinal wave detector is characterized in that medium water (2) is arranged in the container (1), the high-frequency longitudinal wave probe (5), the boiler austenite heat-resistant steel pipe (3) to be detected and the ultrasonic wedge block (6) are immersed in the medium water (2), the ultrasonic wedge block (6) is located on the outer wall of the boiler austenite heat-resistant steel pipe (3) to be detected, the high-frequency longitudinal wave probe (5) is located on the ultrasonic wedge block (6), and the high-frequency longitudinal wave probe (5) is connected with the ultrasonic pulse generator (9) and the oscilloscope (4).
2. The ultrasonic testing device for the intergranular corrosion of the austenitic heat-resistant steel tube of the boiler according to claim 1, wherein the high-frequency longitudinal wave probe (5) is a 15MHz high-frequency longitudinal wave probe.
3. The ultrasonic testing device for the intergranular corrosion of the austenitic heat-resistant steel tube of the boiler according to claim 1, wherein the high-frequency longitudinal wave probe (5) is connected with the ultrasonic pulse generator (9) and the oscilloscope (4) through a cable (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424312.6U CN211318311U (en) | 2019-12-27 | 2019-12-27 | Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424312.6U CN211318311U (en) | 2019-12-27 | 2019-12-27 | Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211318311U true CN211318311U (en) | 2020-08-21 |
Family
ID=72082927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922424312.6U Active CN211318311U (en) | 2019-12-27 | 2019-12-27 | Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211318311U (en) |
-
2019
- 2019-12-27 CN CN201922424312.6U patent/CN211318311U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1344044B1 (en) | Method for ultrasonically detecting multiple types of corrosion | |
| US8820163B2 (en) | Nondestructive inspection apparatus and nondestructive inspection method using guided wave | |
| US7474092B1 (en) | Method and device for long-range guided-wave inspection of fire side of waterwall tubes in boilers | |
| CN103245726B (en) | Method for detecting material hydrogen damage through ultrasonic surface waves | |
| CN101806778A (en) | Method for non-linear ultrasonic online detection of early fatigue damage to metal material | |
| JP4094464B2 (en) | Nondestructive inspection method and nondestructive inspection device | |
| CN111007147A (en) | Ultrasonic detection device and method for intergranular corrosion of austenitic heat-resistant steel pipe of boiler | |
| Ma et al. | The reflection of guided waves from simple dents in pipes | |
| CN106198727A (en) | A kind of non-linear guided circumferential method for metal circular tube Damage Evaluation | |
| CN107024535B (en) | A kind of polyphyly number depth detection method of the vertical defect based on surface wave | |
| CN105424502B (en) | Large-deformation pipeline circumferential weld bending tester and method thereof | |
| Zeng et al. | Detection of surface defects for longitudinal acoustic waves by a laser ultrasonic imaging technique | |
| CN211318311U (en) | Ultrasonic detection device for intergranular corrosion of austenitic heat-resistant steel pipe of boiler | |
| CN114062506B (en) | Air coupling ultrasonic damage imaging system based on non-collinear frequency mixing technology and imaging method thereof | |
| JP4144699B2 (en) | Probe and material evaluation test method using the same | |
| KR100542651B1 (en) | Nondestructive Acoustic Evaluation Device and Method by using Nonlinear Acoustic Responses | |
| CN116026921A (en) | Intelligent grouting sleeve system with built-in annular ultrasonic sensor array | |
| CN105738465B (en) | The defect detection equipment and method of boiler water-wall tube based on low frequency electromagnetic technology | |
| CN204594937U (en) | One utilizes acoustics spectrum analysis to identify the successional device of special-shaped parts | |
| JPH0346070B2 (en) | ||
| CN204314257U (en) | A kind of storage tank bottom plate corrosion non-contact ultrasonic pick-up unit | |
| CN102183581B (en) | Ultrasonic detection method for oxide skin in pipe at heating surface of boiler | |
| JP2017133906A (en) | Compact nonlinear ultrasonic non-destructive checkup device | |
| Vos et al. | Application of Wide-Band Ultrasound for the Detection of Angled Crack Features in Oil and Gas Pipelines | |
| Bunget et al. | Flaw characterization through nonlinear ultrasonics and wavelet cross-correlation algorithms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |