CN2243645Y - Supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of electric power station - Google Patents
Supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of electric power station Download PDFInfo
- Publication number
- CN2243645Y CN2243645Y CN 96208198 CN96208198U CN2243645Y CN 2243645 Y CN2243645 Y CN 2243645Y CN 96208198 CN96208198 CN 96208198 CN 96208198 U CN96208198 U CN 96208198U CN 2243645 Y CN2243645 Y CN 2243645Y
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- utility
- main steam
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- test surface
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- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides a supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of an electric power station. The supersonic probe of the utility model comprises a probe body which comprises a test surface. The utility model is characterized in that the test surface is a curved surface. The curvature radius of the test surface is equal or approximately equal to the curvature radius of the outer wall of the elbow connection of a pipe which is inspected. The utility model has the advantages of high sensitivity, precision and detectable rate for flaw detection, and strong practicability and reliability.
Description
The utility model relates to a kind of ultrasonic inspection probe, particularly be a kind of thermal power plant's main steam, main feed water pipe road elbow interior wall axial crack ultrasonic inspection probe of being used for.
In recent years, thermal power plant's main steam line, the main feed water pipe road elbow great serious accident of this class of sudden booster that in operational process, happens occasionally.The main cause that causes this class pipe explosion accident is that the channel bend inwall exists axial crack, thereby this crack propagation unstability causes sudden booster in operational process.And for the flaw detection of thermal power plant's main steam line, main feed water pipe road elbow interior wall axial crack, also be stuck in the more original method of detection at present, promptly just adopting general test surface is that the angle probe and the conventional method on plane detected a flaw, therefore result of detection is very undesirable, the sensitivity of flaw detection, accuracy and recall rate are very low, and practicality and reliability are very poor.
In view of above reason, the purpose of this utility model is for the sensitivity that a kind of flaw detection is provided, accuracy and recall rate are very high, thermal power plant's main steam, the main feed water pipe road elbow interior wall axial crack ultrasonic inspection probe of practicality and good reliability.
The purpose of this utility model is achieved in that the utility model comprises the sonde body that contains test surface, it is characterized in that the test surface on the sonde body is curved surface (referring to Fig. 1).
The radius-of-curvature of the test surface on the above-mentioned sonde body equates or approximately equal (referring to Fig. 1) with channel bend outer wall radius-of-curvature to be detected.
Test surface on the utility model sonde body is a curved surface, particularly adopted with channel bend outer wall radius-of-curvature to be detected and equated or approximately equalised curved surface, cooperate with existing ultra-sonic defect detector, just can make things convenient for and check out exactly whether thermal power plant's main steam line, main feed water pipe road elbow interior wall exist axial crack, sensitivity and reliability are very high, practical, have high accuracy, flaw detection effect and recall rate are splendid.Particularly at the flaw detection of pressure-bearing sheet-metal duct elbow interior wall axial crack, the utility model has more special advantages and very high flaw detection sensitivity and accuracy (can find 0.5mm and above inwall axial crack), for the safe operation that guarantees thermal power plant's pipeline and elbow provides a kind of very reliable, practical detection means, avoid the generation of great serious accident.The utility model probe can improve on the basis of common angle probe, and cost is low.
Adopt the utility model that 99 elbows in four 50MW units of Chongqing Power Plant φ, 219 * 9mm feed pipe have been carried out the generaI investigation of inwall axial crack, find that altogether there is the inwall axial crack in seven elbows, its inner surface cracks is the most shallow to be 0.5mm, and the darkest 6.5mm is near the limit of explosion.These seven elbows are all changed, and the elbow under pipe cutting is changed confirms that through dissecting one by one all there is the inwall axial crack in seven elbows, and depth range is at 0.5～6.5mm, and this explanation the utility model probe has very high sensitivity, accuracy and reliability.Under the prerequisite that guarantees the pipe safety operation, only be with the elbow of crackles to be changed to seven of checking, duration has only been used seven days (containing detection time), duration saved 23 days, calculate by 200MW unit sky 4,000,000 degree that generate electricity at least, it is exactly 8,280,000 yuan that the duration is saved the direct economic benefit of creating, and adds and saves 92 of bend pipes, by 2500 yuan of every bend pipe cost prices, it saves 230,000 yuan of bend pipe fee of materials.Create and make 8,510,000 yuan of benefits, its achievement is very significant.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
Fig. 1 is the utility model structural representation.
Referring to Fig. 1, the utility model is the improvement on angle probe.Test surface 2 reconditionings that are about in the sonde body 1 become curved surface, and its radius of curvature R 1 is equated with pipe under test elbow 3 outer wall radius of curvature R 2.
When using the utility model probe, will be connected on the general ultra-sonic defect detector from the extension line 5 on the emission wafer 4.
Claims (2)
1, power plant's main steam, main feed water pipe road elbow interior wall axial crack ultrasonic inspection probe comprise the sonde body that contains test surface, it is characterized in that the test surface on the described sonde body is a curved surface.
2, power plant as claimed in claim 1 main steam, main feed water pipe road elbow interior wall axial crack ultrasonic inspection probe is characterized in that the radius-of-curvature of the test surface on the described sonde body equates or approximately equal with channel bend outer wall radius-of-curvature to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208198 CN2243645Y (en) | 1996-04-24 | 1996-04-24 | Supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of electric power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208198 CN2243645Y (en) | 1996-04-24 | 1996-04-24 | Supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of electric power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2243645Y true CN2243645Y (en) | 1996-12-25 |
Family
ID=33892293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96208198 Expired - Fee Related CN2243645Y (en) | 1996-04-24 | 1996-04-24 | Supersonic probe for inspecting axial craze of inner wall of elbow connection of main steam and water supply pipes of electric power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2243645Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737771A (en) * | 2016-01-30 | 2016-07-06 | 湖南工程学院 | Ultrasonic thickness measurement probe used for metal tube and ultrasonic thickness measurement method used for metal tube |
| CN105954355A (en) * | 2016-04-28 | 2016-09-21 | 北京工业大学 | Detection method for detecting width of micro-crack on surface of material |
-
1996
- 1996-04-24 CN CN 96208198 patent/CN2243645Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737771A (en) * | 2016-01-30 | 2016-07-06 | 湖南工程学院 | Ultrasonic thickness measurement probe used for metal tube and ultrasonic thickness measurement method used for metal tube |
| CN105737771B (en) * | 2016-01-30 | 2019-02-22 | 湖南工程学院 | A kind of effective ultrasonic wave thickness measuring probe of metal and the effective ultrasonic thickness measurement method of metal |
| CN105954355A (en) * | 2016-04-28 | 2016-09-21 | 北京工业大学 | Detection method for detecting width of micro-crack on surface of material |
| CN105954355B (en) * | 2016-04-28 | 2018-12-07 | 北京工业大学 | A kind of detection method of material surface micro-crack width |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |