CN203561615U - Special guide rail for monitoring interrupted interlayer expansion of steel plate by TOFD (Time Of Flight Diffraction) - Google Patents
Special guide rail for monitoring interrupted interlayer expansion of steel plate by TOFD (Time Of Flight Diffraction) Download PDFInfo
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- CN203561615U CN203561615U CN201320615513.4U CN201320615513U CN203561615U CN 203561615 U CN203561615 U CN 203561615U CN 201320615513 U CN201320615513 U CN 201320615513U CN 203561615 U CN203561615 U CN 203561615U
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- interrupted
- interlayer
- tofd
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- steel plate
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 239000011229 interlayer Substances 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 230000007547 defect Effects 0.000 claims abstract description 30
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 8
- 238000005476 soldering Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a special guide rail for monitoring interrupted interlayer expansion of a steel plate by TOFD (Time Of Flight Diffraction). The special guide rail comprises at least two pairs of vertical guide rails which are symmetrically arranged on the two sides of a wing plate and are vertical to an interrupted interlayer defect; the vertical guide rails comprises stainless steel thin plates and supporting legs; after the supporting legs are vertically soldered at the two ends of the stainless steel thin plates, the supporting legs are respectively soldered on the inner and outer surfaces of the wing plate of the interrupted interlayer defect in a direction vertical to the defect direction to form a pair; the horizontal directions of each pair are the same; the plurality of pairs are distributed at equal distances to form small cells and the small cells are numbered. The special guide rail disclosed by the utility model has the advantages that after the small cells are numbered, the change condition of an interrupted interlayer of the steel plate on the same small cell can be accurately and conveniently compared in front and back continuous monitoring processes, so that the expansion tendency of the interrupted interlayer defect is grasped; the special guide rail is simple in structure and can be conveniently used for monitoring the interrupted interlayer expansion of the steel plate.
Description
Technical field
It is diffraction time difference method ultrasonic detecting technology that the utility model relates to a kind of TOFD() exclusive guideway of the interrupted interlayer of monitoring steel plate expansion.
Background technology
Along with greatly developing of large capacity, high parameter genset, the steel plate of steel construction head tree wing plate is more and more thicker.Steel plate is thicker occurs that in the process of rolling the possibility of interlayer defect is just larger.But the domestic current standard just chemical composition to steel plate, mechanical property (stretching, bending, impact), surface quality etc. has been made reinspection regulation, mandatory requirement manufacture of steel structure factory does not carry out inherent vice ultrasonic testing to purchased steel plate before blanking processing, and the domestic quality standard that there is no the ultrasonic testing of steel construction steel plate inherent vice.Therefore as long as the mechanical test of steel plate is qualified, can carry out the ultrasound wave of steel plate and review, unless both sides of supply and demand agreement has requirement.
If head tree wing plate inside exists interrupted interlayer defect, (steel plate is thoroughly layering not, but stipulate by JB/T4730-2005 standard, conventional pulse-echo ultrasound examination has reached V level, the poorest rank), these interrupted interlayers are about 2-4mm, disperse is in steel plate inside, but mechanical property (mechanical property is the main basis of steel construction strength and stability) is not impacted, in addition the factor such as power plant construction duration anxiety, just contains interrupted interlayer defect in the head tree wing plate steel plate of a lot of power plant.Therefore adopt suitable method to carry out periodic monitoring to this type of interrupted interlayer defect, just become the important means of prevention Defect expanding.
At present, the detection method of steel plate inherent vice extensively adopts conventional pulse-echo ultrasound wave, but this type of defect has reached V level (the poorest level), and therefore conventional pulse-echo supercritical ultrasonics technology has been difficult to meet the requirement of monitoring Defect expanding.
Utility model content
Technical problem to be solved in the utility model is to provide the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate, and it can guarantee that each TOFD check position is identical, to can compare same position, the defect situation of change of different proving times.
The utility model solves the technical scheme that its technical matters adopts: the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate, and its gordian technique is: it comprises that at least two pairs are symmetrically set in wing plate both sides and the longitudinal rail perpendicular to interrupted interlayer defect;
Described longitudinal rail comprises stainless sheet steel and supporting leg, and two supporting legs are vertically brazed in the two ends of described stainless sheet steel, and the other end soldering of described supporting leg is containing on the wing plate surface of interrupted interlayer defect, and adjacent longitudinal rail forms grid.
Described stainless sheet steel adopts the corrosion resistant plate that thickness is 1mm ± 0.02mm; Described supporting leg adopts the stainless steel column that diameter is 1mm ± 0.02mm.
The aspect ratio of described stainless sheet steel and described supporting leg is 2:1; The height of the height sum of described stainless sheet steel and described supporting leg and TOFD probe adapts.
The length of described stainless sheet steel and described wing plate inside surface outer rim to the distance at web place adapt.
The length of the width of described grid and TOFD probe adapts; The length of described grid and the length of described stainless sheet steel adapt.
The beneficial effects of the utility model are: TOFD technology is very responsive to little defect, to being parallel to can the reach ± 0.3mm of monitoring capability of Defect expanding of its sound beam direction, are extremely applicable to the spread scenarios of the interrupted interlayer defect of monitoring steel plate.Whether to some extent when the inner interrupted interlayer of steel construction head tree wing plate is carried out to TOFD monitoring, the most important is to guarantee that the position of each TOFD check must be identical, so just can reach monitoring same position, the defect of the different proving times effect of variation.For guaranteeing optimum sensitivity and the resolution of TOFD check, by the direction perpendicular to defect trend, on the inside and outside surface of the wing plate containing interrupted interlayer defect, this guide rail of soldering in pairs, and every pair of horizontal level is identical, some to after disposed at equal distance, form sub-box.Grid is numbered, in the continuous observation process in front and back, can compares accurately and conveniently the situation of change of the interrupted interlayer of same position steel plate, thereby grasp the development trend of defect; The utility model is simple in structure, is convenient to make, can be easily for the defect inspection of the interrupted interlayer of steel plate.
Accompanying drawing explanation
Fig. 1 is power plant boiler steel construction head tree structural representation;
Fig. 2 is the inner interrupted interlayer defect diagrammatic cross-section of head tree wing plate;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is the A-A direction schematic diagram of Fig. 3;
Fig. 5 is that the utility model soldering is at the schematic diagram containing on the wing plate of interrupted interlayer defect;
Fig. 6 is the B-B direction view of Fig. 5;
Fig. 7 is the interrupted interlayer defect expansion of TOFD technical monitoring schematic diagram;
Wherein, 1, wing plate; 2, web, 3, supporting leg; 4, stainless sheet steel; 5, grid; 6, TOFD probe; 7, TOFD center probe line; H1, stainless sheet steel and height of landing leg sum; H2, Thin Stainless Steel plate height.
Embodiment
Referring to attached Fig. 1 and 2, the interrupted interlayer position situation of known power plant boiler steel construction head tree wing plate inside.
Referring to accompanying drawing 3-7, the utility model comprises some to being symmetrically set in wing plate 1 both sides and the longitudinal rail perpendicular to the interrupted interlayer defect on wing plate 1;
Described longitudinal rail consists of stainless sheet steel 4 and described supporting leg 3; Described supporting leg 3 is vertically brazed in the two ends of described stainless sheet steel 4, again by the direction perpendicular to defect trend, soldering forms a pair of on the inside and outside surface of described wing plate 1 respectively, and every a pair of horizontal level is identical, some to after disposed at equal distance, form described grid 5, and described grid 5 is numbered.
It is the corrosion resistant plate of 1mm ± 0.02mm that described stainless sheet steel 4 adopts thickness; It is the stainless steel column of 1mm ± 0.02mm that described supporting leg 3 adopts diameter.
Described stainless sheet steel 4 is 2:1 with the aspect ratio of described supporting leg 3; Described stainless sheet steel 4 adapts with the height sum of described supporting leg 3 and the height of described TOFD probe 6.
The length of described stainless sheet steel 4 and described wing plate 1 inside surface outer rim to the distance at described web 2 places adapts.
The length of the width of described grid 5 and described TOFD probe 6 adapts; The length of the length of described grid 5 and described stainless sheet steel 4 adapts.According to the size of defect area, determine the quantity of described grid 5, described grid 5 is carried out to permanent numbering in order.
Adopt the utility model regularly to carry out TOFD check, the TOFD assay of each identical sub-box, different number of times is contrasted, just can monitor interrupted interlayer.
Claims (5)
1. an exclusive guideway for the interrupted interlayer expansion of TOFD monitoring steel plate, is characterized in that: it comprises that at least two pairs are symmetrically set in wing plate (1) both sides and the longitudinal rail perpendicular to interrupted interlayer defect;
Described longitudinal rail comprises stainless sheet steel (4) and supporting leg (3), two supporting legs (3) are vertically brazed in the two ends of described stainless sheet steel (4), the other end soldering of described supporting leg (3) is containing on wing plate (1) surface of interrupted interlayer defect, and adjacent longitudinal rail forms grid (5).
2. the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate according to claim 1, is characterized in that: described stainless sheet steel (4) adopts the corrosion resistant plate that thickness is 1mm ± 0.02mm; Described supporting leg (3) adopts the stainless steel column that diameter is 1mm ± 0.02mm.
3. the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate according to claim 1, is characterized in that: described stainless sheet steel (4) is 2:1 with the aspect ratio of described supporting leg (3); Described stainless sheet steel (4) adapts with the height sum of described supporting leg (3) and the height of TOFD probe (6).
4. the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate according to claim 1, is characterized in that: the distance that the length of described stainless sheet steel (4) and described wing plate (1) inside surface outer rim are located to web (2) adapts.
5. according to the exclusive guideway of the interrupted interlayer expansion of a kind of TOFD monitoring steel plate described in claim 1-4 any one, it is characterized in that: the length of the width of described grid (5) and described TOFD probe (6) adapts; The length of the length of described grid (5) and described stainless sheet steel (4) adapts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320615513.4U CN203561615U (en) | 2013-10-08 | 2013-10-08 | Special guide rail for monitoring interrupted interlayer expansion of steel plate by TOFD (Time Of Flight Diffraction) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320615513.4U CN203561615U (en) | 2013-10-08 | 2013-10-08 | Special guide rail for monitoring interrupted interlayer expansion of steel plate by TOFD (Time Of Flight Diffraction) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561615U true CN203561615U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320615513.4U Expired - Lifetime CN203561615U (en) | 2013-10-08 | 2013-10-08 | Special guide rail for monitoring interrupted interlayer expansion of steel plate by TOFD (Time Of Flight Diffraction) |
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| CN (1) | CN203561615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049034A (en) * | 2014-07-02 | 2014-09-17 | 国电科学技术研究院 | Method for estimating fatigue propagation life of intermittent sandwich steel plate |
-
2013
- 2013-10-08 CN CN201320615513.4U patent/CN203561615U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049034A (en) * | 2014-07-02 | 2014-09-17 | 国电科学技术研究院 | Method for estimating fatigue propagation life of intermittent sandwich steel plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE POWER BOILERS AND PRESSURE VESSELS INSPECTIN Free format text: FORMER OWNER: GUODIAN SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Effective date: 20141225 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210031 NANJING, JIANGSU PROVINCE TO: 102209 CHANGPING, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141225 Address after: 102209, Beijing, Changping District future science and Technology north of the city district, the New Research Institute of energy technology, building 309, room 9607, room 6 Patentee after: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION CENTER Address before: 210031 Pudong Road, Pukou District, Jiangsu, No. 10, No. Patentee before: Guodian Science and Technology Research Institute |
|
| CP03 | Change of name, title or address |
Address after: Room 9607, Floor 6, Building 309, Guodian New Energy Technology Research, North District, Future Science and Technology City, Changping District, Beijing, 102211 Patentee after: Guoneng boiler and Pressure Vessel Inspection Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION CENTER |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
|
| CX01 | Expiry of patent term |