CN201408169Y - Dedicated image quality indicator for radiographic testing of welded joints of tube sheets and heat exchange tubes - Google Patents
Dedicated image quality indicator for radiographic testing of welded joints of tube sheets and heat exchange tubes Download PDFInfo
- Publication number
- CN201408169Y CN201408169Y CN2009200068032U CN200920006803U CN201408169Y CN 201408169 Y CN201408169 Y CN 201408169Y CN 2009200068032 U CN2009200068032 U CN 2009200068032U CN 200920006803 U CN200920006803 U CN 200920006803U CN 201408169 Y CN201408169 Y CN 201408169Y
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- China
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- image quality
- quality indicator
- heat exchanger
- exchanger tube
- welding joint
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- Expired - Lifetime
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model relates to the field of radiographic testing, in particular to a dedicated image quality indicator for the radiographic testing of the welded joints of tube sheets and heat exchangetubes. The image quality indicator is a round plate with a round hole (a) at the middle, the diameter of the round hole (a) is equal to the inner diameter (Di) of a heat exchange tube, concave holes (b) are evenly arranged around the round hole (a) on the bottom of the round plate, the area which is 10mm away from the edge of the round plate on the upper end surface of the round plate is a plane (P), and a curved surface X is between the plane (P) and the edge of the round hole (a). Placed in the assessed area of a welded joint, the improved dedicated image quality indicator can more truly reflect photographic sensitivity. Because the small holes of the improved dedicated image quality indicator is drilled close to one side of a tube sheet, the image can more approximate the image of the air hole of the root of the welded joint, thus more truly reflecting the photographic sensitivity of the radiographic testing of the welded joint.
Description
Technical field
The utility model relates to the ray detection field, is specifically related to a kind of ray detection image quality indicator.
Background technology
The picture element that uses in existing tube sheet-heat exchanger tube welding joint ray detection technology is counted the plate image quality indicator that is drilled with different apertures, and is placed in the heat exchanger tube, shown in Fig. 1 a and Fig. 1 b.In existing tube sheet-heat exchanger tube welding joint ray detection technology since image quality indicator be to be placed in the heat exchanger tube, rather than be placed on tube sheet-heat exchanger tube welding joint place, welding joint is shown in Fig. 2 a and Fig. 2 b, so the photographic sensitivity that it reflects can not be represented the photographic sensitivity at welding joint place really.In addition, when error appearred in angle of radiation behind the source terminal in the radiography specialized equipment, image quality indicator was placed on the image that will can not get the image quality indicator aperture in the heat exchanger tube, made the photographic sensitivity of area of interest fubaritic.Therefore, need and to satisfy the sensitivity requirement at welding joint place in order to make detection technique, so propose and designed the special-purpose image quality indicator of tube sheet-heat exchanger tube welding joint ray detection.
Summary of the invention
The purpose of this utility model provides the special-purpose image quality indicator of tube sheet-heat exchanger tube welding joint ray detection that a kind of sensitivity that can make detection system satisfy the welding joint place requires.
The utility model is achieved in that the special-purpose image quality indicator of a kind of tube sheet-heat exchanger tube welding joint ray detection, and it is the plectane that a centre has circular hole a, it is characterized in that: the diameter of circular hole a and heat exchanger tube inside diameter D
iEqual and opposite in direction along circumferentially evenly having 3～4 shrinkage pool b, the plectane upper surface, is plane P in the scope of distance plectane edge 10mm around plectane bottom, circular hole a, is curved surface X between it and the circular hole a edge.
At the special-purpose image quality indicator of above-mentioned tube sheet-heat exchanger tube welding joint ray detection, wherein: the shape of curved surface X is consistent with the welding joint shape, and the circumferential uniform diameter of a circle of shrinkage pool b is than the big 3～4mm of heat exchanger tube external diameter.
Advantage of the present utility model is: the degree that can the image quality indicator aperture be identified and the readability of image and pass image quality indicator and the residing relative position of radiographic source have much relations, the axis of aperture and the angle of ray are more little, its image is just clear more, easy more being identified.Photographic sensitivity more can be reflected truly in the evaluation zone that special-purpose image quality indicator after the improvement is placed on welding joint.Near tube sheet one side, its image is more near the image of welding joint root pore with star drill for special-purpose image quality indicator after the improvement, thus the photographic sensitivity of Reaction Welding joint ray detection more truly.
Description of drawings
Fig. 1 a is existing dull and stereotyped image quality indicator synoptic diagram;
Fig. 1 b places synoptic diagram for existing dull and stereotyped image quality indicator;
Fig. 2 a is the welding joint form that pipe stretches out tube sheet;
Fig. 2 b is the welding joint form that pipe does not stretch out tube sheet;
The I type image quality indicator synoptic diagram that Fig. 3 a provides for the utility model;
The II type image quality indicator synoptic diagram that Fig. 3 b provides for the utility model;
Fig. 4 a is the placement location synoptic diagram of the special-purpose image quality indicator of I type;
Fig. 4 b is the placement location synoptic diagram of the special-purpose image quality indicator of II type;
Fig. 5 is that special-purpose image quality indicator uses synoptic diagram;
Among the figure: 1. tube sheet, 2. heat exchanger tube, 3. special-purpose image quality indicator, 4. locating ring, 5. little focus radioactive source, 6. shielding slab, 7. filter plate, 8. film, 9. backward scattering protection stereotype, 10. adapter, 11. tube sheets-heat exchanger tube radiography specialized equipment.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Shown in Fig. 3 a and Fig. 3 b, this special-purpose image quality indicator is the plectane that a centre has circular hole a, and the height H of I type plectane can be one of heat exchanger tube extension elongation plus thirty fusion penetration, inside diameter D
iBe heat exchanger tube internal diameter, outer diameter D
oThe heat-affected zone width that the weld width that adds twice for the heat exchanger tube external diameter adds twice adds suitable surplus, for example 20mm; The height H of the special-purpose image quality indicator of II type is that weld reinforcement adds fusion penetration, inside diameter D
iBe heat exchanger tube internal diameter, outer diameter D
oThe heat-affected zone width that the weld width that adds twice for the heat exchanger tube external diameter adds twice adds for example 20mm of suitable surplus.
The flat-bottom hole diameter can be provided with by the correlation technique conditional request, as:
Deng.The degree of depth also is provided with by the correlation technique conditional request.
Wherein, the diameter of circular hole and heat exchanger tube internal diameter equal and opposite in direction in image quality indicator plectane bottom, circular is along circumferentially evenly having 3～4 shrinkage pool b, the plectane upper surface, are the plane in the inside 10mm scope in distance plectane edge, are curved surface X between it and the circular hole edge.The special-purpose image quality indicator X of I type curve form is circular-arc projection, and the special-purpose image quality indicator X of II type curve form is circular-arc caving inward.The shape of the curved surface on the image quality indicator is consistent with the welding joint shape, shown in Fig. 4 a and Fig. 4 b.
Shrinkage pool circumferentially is distributed on the diameter of a circle of special-purpose image quality indicator bottom surface than the big 3mm of heat exchanger tube external diameter, 3.5mm or 4mm.
As shown in Figure 5, when carrying out the evaluation of radiography technology, special-purpose image quality indicator 3 is placed on tube sheet-heat exchanger tube welding joint simulating piece, on tube sheet 1 and the heat exchanger tube 2, radiography specialized equipment 11 and adapter 10 are connected, install backward scattering protection stereotype 9, film 8, filter plate 7, shielding slab 6 and locating ring 4 successively, locating ring 4 front ends are placed little focus radioactive source 5.Adapter is fixed on the tube sheet, can carries out the evaluation of radiography technology.When other quality index of egative film meet the correlation technique conditional request, as long as technical conditions require observed aperture image high-visible on egative film, just illustrate that radiographic sensitivity meets the requirements, selected ray detection system accreditation also just is described, meet the technical conditions requirement, when the product welding joint was implemented radiography, this detection technique can satisfy technical requirement.
Claims (2)
1. the special-purpose image quality indicator of a tube sheet-heat exchanger tube welding joint ray detection, it is the plectane that a centre has circular hole a, it is characterized in that: the diameter of circular hole a and heat exchanger tube inside diameter D
iEqual and opposite in direction along circumferentially evenly having 3～4 shrinkage pool b, the plectane upper surface, is plane P in the scope of distance plectane edge 10mm around plectane bottom, circular hole a, is curved surface X between it and the circular hole a edge.
2. the special-purpose image quality indicator of a kind of according to claim 1 tube sheet-heat exchanger tube welding joint ray detection, it is characterized in that: the shape of described curved surface X is consistent with the welding joint shape, and the circumferential uniform diameter of a circle of shrinkage pool b is than the big 3～4mm of heat exchanger tube external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200068032U CN201408169Y (en) | 2009-03-04 | 2009-03-04 | Dedicated image quality indicator for radiographic testing of welded joints of tube sheets and heat exchange tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200068032U CN201408169Y (en) | 2009-03-04 | 2009-03-04 | Dedicated image quality indicator for radiographic testing of welded joints of tube sheets and heat exchange tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408169Y true CN201408169Y (en) | 2010-02-17 |
Family
ID=41679106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200068032U Expired - Lifetime CN201408169Y (en) | 2009-03-04 | 2009-03-04 | Dedicated image quality indicator for radiographic testing of welded joints of tube sheets and heat exchange tubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408169Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849920A (en) * | 2019-11-28 | 2020-02-28 | 中国航发沈阳黎明航空发动机有限责任公司 | Preparation method and application of image quality measuring block for pipe weld seam radiographic testing |
| RU206966U1 (en) * | 2021-06-10 | 2021-10-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" | A device for testing samples of "tube-tube sheet" connections of a shell-and-tube heat exchanger |
-
2009
- 2009-03-04 CN CN2009200068032U patent/CN201408169Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849920A (en) * | 2019-11-28 | 2020-02-28 | 中国航发沈阳黎明航空发动机有限责任公司 | Preparation method and application of image quality measuring block for pipe weld seam radiographic testing |
| CN110849920B (en) * | 2019-11-28 | 2021-12-24 | 中国航发沈阳黎明航空发动机有限责任公司 | Preparation method and application of image quality measuring block for pipe weld seam radiographic testing |
| RU206966U1 (en) * | 2021-06-10 | 2021-10-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" | A device for testing samples of "tube-tube sheet" connections of a shell-and-tube heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100217 |
|
| CX01 | Expiry of patent term |