CN105806956A - Probe assembly used for ultrasonic inspection of heat-transfer pipe of steam generator - Google Patents
Probe assembly used for ultrasonic inspection of heat-transfer pipe of steam generator Download PDFInfo
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- CN105806956A CN105806956A CN201410841436.3A CN201410841436A CN105806956A CN 105806956 A CN105806956 A CN 105806956A CN 201410841436 A CN201410841436 A CN 201410841436A CN 105806956 A CN105806956 A CN 105806956A
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Abstract
The invention relates to a probe assembly used for ultrasonic inspection of a heat-transfer pipe of a steam generator. The probe assembly comprises ultrasonic probes, a probe clamp and a guiding head, wherein the probe clamp is of a cylindrical structure, and the external diameter of the probe clamp is slightly smaller than the internal diameter of the heat-transfer pipe of the steam generator; a plurality of probe installing holes are arranged along the axial direction of the probe clamp at an equal interval and penetrate the probe clamp along the radial direction of the probe clamp, and the ultrasonic probes are embedded in the probe installing holes; the probe clamp is further provided with a cable hole which is communicated with one axial end of the probe clamp; two petals are respectively snapped at two ends of the probe clamp and are plastic hollow petal self-locking joints; the maximum external diameter of the petals in expansion is slightly greater than the internal diameter of the heat-transfer pipe of the steam generator; the petal, far way from of the end with the cable hole of the probe clamp, on the probe clamp is connected with the guiding head; and an ultrasonic cable is threaded into the cable hole from the petal located at the end, provided with the cable hole, of the probe clamp and is then connected with the ultrasonic probes. The probe assembly provided by the invention is used for inspection of the heat-transfer pipe of the steam generator, especially for inspection of a special structure of a transition zone of an expand tube.
Description
Technical field
The present invention relates to nuclear engineering technical field, be specifically related to a kind of ultrasonographic probe assembly of steam generator heat-transfer pipe.
Background technology
Steam generator is the key equipment of power set, and heat-transfer pipe is the critical component of steam generator, has several thousand tiny heat-transfer pipes with only small gap distribution in steam generator on tube sheet.Inside heat-transfer pipe, with outside secondary side water, the primary side water of High Temperature High Pressure being carried out heat exchange by heat-transfer pipe during work, heat-transfer pipe also plays the effect of isolation simultaneously.For ensureing the safe operation of whole dynamical system, it is necessary to steam generator heat-transfer pipe is carried out periodic inspection.
Steam generator heat-transfer pipe, in running, is subject to the effect such as High Temperature High Pressure and alternate load, it is easy to produce the defects such as circumference, axial crack, burn into spot corrosion and caliber wall thickness changes.It is generally adopted eddy detection technology at present both at home and abroad and steam generator heat-transfer pipe is implemented inspection, eddy current probe is adopted to check from heat-transfer pipe inner surface, but the inspection of heat-transfer pipe defect, evaluation and tolerance are had its limitation by eddy current inspection technology, it is still a great difficult problem of inspection.Steam generator heat-transfer pipe internal diameter is little, and tube wall is thin, and is sealed in inside steam generator, if adopting eddy detection technology, complex-shaped crack detection level is relatively low, to Flaw discrimination, quantitatively inaccurate；Tube expansion transition region caliber and wall thickness that heat-transfer pipe is connected with tube sheet are continually changing, and heat-transfer pipe and tube sheet both basic materials there are differences, and during employing EDDY CURRENT, electric current cannot ensure its precision, EDDY CURRENT can be caused difficulty；And when heat-transfer pipe is carried out eddy current inspection, polytype detection probe generally can be selected to test, the risk changing the pop one's head in personnel caused and equipment will certainly be increased.
Summary of the invention
It is an object of the invention to provide a kind of for steam generator heat-transfer pipe inspection, the particularly ultrasonographic probe assembly of the steam generator heat-transfer pipe of the inspection of tube expansion transition region special construction.
The present invention is achieved in that a kind of ultrasonographic probe assembly of steam generator heat-transfer pipe, including: ultrasonic probe, probe gripper, guide head；
Described probe gripper is column structure, and its external diameter is slightly less than steam generator heat-transfer pipe internal diameter；Being axially arranged with several uniform intervals and the probe mounting holes of radially break-through along it, ultrasonic probe card is embedded in described probe mounting holes；Probe gripper is additionally provided with a cable aperture, one end axial with it break-through of this cable aperture；Two petals are connected to probe gripper two ends respectively；Described petal is plastic hollow petal self-locking joint；The maximum outside diameter of petal expansion is slightly larger than steam generator heat-transfer pipe internal diameter；Probe gripper is connected with guide head away from the petal being provided with cable aperture one end；Ultrasonic cable is provided with the petal of cable aperture one end from probe gripper and penetrates cable aperture and be connected with ultrasonic probe.
The column structure outside wall surface of described probe gripper has two radial slots, and this groove in axial direction extends and rectangular plane, has five uniform intervals and the probe mounting holes of radially break-through in described groove, and ultrasonic probe card is embedded in described probe mounting holes.
Described ultrasonic probe includes axial oblique incidence probe, compressional wave normal probe, circumference oblique incidence probe；
Two axial oblique incidence probes, compressional wave normal probe, two circumferential oblique incidence probes are sequentially embedded in described five probe mounting holes；Two axial oblique incidences probe, a compressional wave normal probe, two circumferential oblique incidence probes probe detection faces concordant with the rectangle plane of a described groove.
The coniform plastic body of described guide head, its external diameter is less than steam generator heat-transfer pipe internal diameter.
The invention has the beneficial effects as follows,
(1) present invention adopts special ultrasonic probe, i.e. high-frequency narrow-pulse point focusing water logging ultrasonic probe, it is possible to heat-transfer pipe internal implementation full volumetric scanning, it is possible to avoid near field region to affect, and probe resolution is high.By ultrasound acquisition data are analyzed, it is possible to accurately find flaw indication, improve defect detection rate, and defect is carried out qualitative analysis, volume flaw is carried out linear measure longimetry, axial crack and circumferential crack are carried out height and linear measure longimetry.Trommel accurately can be judged, and measure thinning size.
(2) present invention adopts special probe gripper, water logging ultrasonic probe is installed in probe gripper, inside workpiece can be incided with certain refraction angle, direction according to probe mounting holes is different, can realize carrying out scanning to carrying out different directions defect in heat-transfer pipe, compressional wave normal probe and multiple angle probe are installed simultaneously, compressional wave normal probe can detect the change of heat-transfer pipe pipe thickness, oblique incidence probe can detect the crackle on any direction and corrosion class defect, and defect is carried out qualitative and quantitative；Reduce the risk changing the pop one's head in personnel caused and equipment, save the review time, improve and check efficiency.
Accompanying drawing explanation
Fig. 1 is the ultrasonographic probe assembly structure of vapour generator heat-transfer pipe of the present invention and application schematic diagram；
Fig. 2 is the probe gripper schematic diagram of the ultrasonographic probe assembly of vapour generator heat-transfer pipe of the present invention；
Fig. 3 is that in the axial oblique incidence probe water of ultrasonic probe, angle of incidence calculates schematic diagram；
Fig. 4 is that in ultrasonic probe circumference oblique incidence probe water, angle of incidence and eccentric throw calculate schematic diagram；
In figure, 1 probe assembly；2 ultrasonic probes；3 probe gripper；4 petals；5 ultrasonic cables；6 cable aperture；7 axial oblique incidence probes；8 compressional wave normal probes；9 circumference oblique incidence probes；10 guide heads.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail:
The ultrasonographic probe assembly of a kind of steam generator heat-transfer pipe of the present invention, including: ultrasonic probe 2, probe gripper 3, guide head 10；
Probe gripper 3 is column structure, and its external diameter is slightly less than steam generator heat-transfer pipe internal diameter；It is axially arranged with the probe mounting holes of five uniform intervals and radially break-through along it；
Specifically, the outside wall surface of column structure has two radial slots, and this groove in axial direction extends and rectangular plane, has five uniform intervals and the probe mounting holes of radially break-through in described groove；
Probe gripper 3 is additionally provided with a cable aperture 6, this cable aperture 6 one end axial with it break-through；
Ultrasonic probe 2 includes axial oblique incidence probe 7, compressional wave normal probe 8, circumference oblique incidence probe 9；
8, two circumferential oblique incidences probes 9 of two axial oblique incidence 7, compressional wave normal probes of probe are sequentially embedded in described five probe mounting holes；The probe detection faces of two axial oblique incidence 8, two circumferential oblique incidences probes 9 of 7, compressional wave normal probe of probe is concordant with the rectangle plane of a described groove；
Two petals 4 are connected to probe gripper 3 two ends respectively；Described petal 4 is plastic hollow petal self-locking joint；The maximum outside diameter of petal 4 expansion is slightly larger than steam generator heat-transfer pipe internal diameter；
Probe gripper 3 is connected with guide head 10 away from the petal 4 being provided with cable aperture one end；
The coniform plastic body of guide head 10, its external diameter is less than steam generator heat-transfer pipe internal diameter；
Ultrasonic cable 5 is provided with the petal 4 of cable aperture one end from probe gripper 3 and penetrates cable aperture 6 and be connected with ultrasonic probe 2.
Multiple probe can be realized for steam generator heat-transfer pipe ultrasonic examination, the probe of design and component system in heat-transfer pipe, implement the positive and negative both direction inspection of circumferential and axial simultaneously.
This kind of probe and component system 1 are mainly formed (see Fig. 1) by ultrasonic probe 2, probe gripper 3, petal 4, ultrasonic cable 5.
Ultrasonic probe 2: for steam generator heat-transfer pipe ultrasonic examination, designs multi-channel high frequency burst pulse point focusing compressional wave normal probe.
Probe wafer, frequency and bandwidth selection: heat-transfer pipe tube wall is thin, and probe wafer size can be chosen and the wall thickness wafer size with the order of magnitude.Because of the minimum crackle detecting wall thickness 10% height, then frequency probe at least should be 15MHz, chooses the less probe of periodicity and can improve sound beam direction resolution.
Determining water layer thickness: water logging ultrasonic examination, water layer thickness is important design parameter.Avoid the impact on ultrasonic signal of the water termination ripple, design suitable water layer thickness, it is ensured that the secondary counter ejected wave of the triple reflection ripple of compressional wave normal probe and oblique incidence probe is between first time water termination ripple and second time water termination ripple.
Focal length is determined: heat transfer tube configuration is special, design point focusing probe, selects suitable focal range to cover total wall thickness, improves volumetric defect, the location of circumferential and axial crackle and quantitative accuracy.
Probe gripper 3: according to the ultrasonographic requirement of water logging, the probe gripper of design specialized.Probe gripper includes cable aperture 6, axial oblique incidence probe mounting holes 7, compressional wave normal probe installing hole 8 and circumference oblique incidence probe mounting holes 9 four part composition.As shown in Figure 2, Fig. 3 is that in axial oblique incidence probe water, angle of incidence calculates schematic diagram to probe gripper, and Fig. 4 is that in circumference oblique incidence probe water, angle of incidence and eccentric throw calculate schematic diagram.
The refraction angle that axial oblique incidence probe 7 is identical with circumference oblique incidence probe 9 employings, angle is β.The angle of inclination of probe incidence angle θ in water and installing hole can be calculated according to ultrasonic probe acoustic beam refraction angle in heat-transfer pipe workpiece, calculated by below equation:
Incidence angle θ=arcsin (CW*sin β/CS)
Wherein: CW represents the velocity of sound in water；
CS represents the angled beam velocity of sound in heat-transfer pipe.
Axial oblique incidence is popped one's head in center and heat-transfer pipe center copline, then the eccentric throw X=0mm of installing hole of 7 installing holes；Circumference oblique incidence is popped one's head in the center of off-centring heat-transfer pipe of 9 installing holes, it is possible to according to below equation, the distance at circumference oblique incidence installing hole deviation heat-transfer pipe center is calculated:
Eccentric throw X=sin θ * R
Wherein: θ represents angle of incidence in water；
R represents heat-transfer pipe internal diameter.
Petal 4: probe gripper 3, ultrasonic probe 2 are connected with ultrasonic cable 5 by petal, forms probe assembly overall structure.The external diameter of petal 4 and heat-transfer pipe internal diameter adapt, and the center that can automatically be adjusted probe assembly by petal 4 is coincided with heat-transfer pipe center, and plays the effect supporting probe and assembly.
Ultrasonic cable 5: the stub cable in probe assembly, a branch of totally 5, stub cable one end is connected through cable aperture on fixture with ultrasonic probe, and the other end is connected with Ultrasound Instrument by cable connector joint, realize the conduction of ultrasonic signal, data acquisition transmits signal to ultrasound acquisition software.
Claims (4)
1. the ultrasonographic probe assembly of steam generator heat-transfer pipe, it is characterised in that: including: ultrasonic probe, probe gripper, guide head；
Described probe gripper is column structure, and its external diameter is slightly less than steam generator heat-transfer pipe internal diameter；Being axially arranged with several uniform intervals and the probe mounting holes of radially break-through along it, ultrasonic probe card is embedded in described probe mounting holes；Probe gripper is additionally provided with a cable aperture, one end axial with it break-through of this cable aperture；Two petals are connected to probe gripper two ends respectively；Described petal is plastic hollow petal self-locking joint；The maximum outside diameter of petal expansion is slightly larger than steam generator heat-transfer pipe internal diameter；Probe gripper is connected with guide head away from the petal being provided with cable aperture one end；Ultrasonic cable is provided with the petal of cable aperture one end from probe gripper and penetrates cable aperture and be connected with ultrasonic probe.
2. the ultrasonographic probe assembly of steam generator heat-transfer pipe described in claim 1, it is characterized in that: the column structure outside wall surface of described probe gripper has two radial slots, this groove in axial direction extends and rectangular plane, having five uniform intervals and the probe mounting holes of radially break-through in described groove, ultrasonic probe card is embedded in described probe mounting holes.
3. the ultrasonographic probe assembly of steam generator heat-transfer pipe described in claim 2, it is characterised in that: described ultrasonic probe includes axial oblique incidence probe, compressional wave normal probe, circumference oblique incidence probe；
Two axial oblique incidence probes, compressional wave normal probe, two circumferential oblique incidence probes are sequentially embedded in described five probe mounting holes；Two axial oblique incidences probe, a compressional wave normal probe, two circumferential oblique incidence probes probe detection faces concordant with the rectangle plane of a described groove.
4. the ultrasonographic probe assembly of steam generator heat-transfer pipe described in claim 2, it is characterised in that: the coniform plastic body of described guide head, its external diameter is less than steam generator heat-transfer pipe internal diameter.
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| CN201410841436.3A CN105806956B (en) | 2014-12-30 | 2014-12-30 | A kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination |
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| CN201410841436.3A CN105806956B (en) | 2014-12-30 | 2014-12-30 | A kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination |
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| CN105806956A true CN105806956A (en) | 2016-07-27 |
| CN105806956B CN105806956B (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179984A (en) * | 2019-07-03 | 2021-01-05 | 国核电站运行服务技术有限公司 | Ultrasonic probe device for pipeline detection |
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| CN85105453A (en) * | 1985-07-17 | 1987-01-21 | 西屋电气公司 | Ultrasonic non-destructive pipe testing system |
| CN1510783A (en) * | 2002-12-24 | 2004-07-07 | 上海旭隆电气有限公司 | Petaling self-locking copper joint of cable |
| CN201503421U (en) * | 2009-09-17 | 2010-06-09 | 宝山钢铁股份有限公司 | Quick mounting device for ultrasonic inspection probe |
| CN201876438U (en) * | 2010-12-02 | 2011-06-22 | 核动力运行研究所 | Centering device for eddy current testing probe |
| CN102359802A (en) * | 2011-07-26 | 2012-02-22 | 上海交通大学 | Device for installing externally-clamping probes of portable ultrasonic flow meter |
| CN202281765U (en) * | 2011-10-17 | 2012-06-20 | 中广核检测技术有限公司 | Vortex detection probe for CEPR nuclear power plant control rod-drive mechanism |
| CN203658312U (en) * | 2013-12-30 | 2014-06-18 | 中核武汉核电运行技术股份有限公司 | Combined ultrasonic-eddy current detection probe clamping structure |
| CN103925004A (en) * | 2014-03-04 | 2014-07-16 | 中国矿业大学(北京) | Precision deformation monitoring method for surrounding rock of roadway |
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2014
- 2014-12-30 CN CN201410841436.3A patent/CN105806956B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105453A (en) * | 1985-07-17 | 1987-01-21 | 西屋电气公司 | Ultrasonic non-destructive pipe testing system |
| CN1510783A (en) * | 2002-12-24 | 2004-07-07 | 上海旭隆电气有限公司 | Petaling self-locking copper joint of cable |
| CN201503421U (en) * | 2009-09-17 | 2010-06-09 | 宝山钢铁股份有限公司 | Quick mounting device for ultrasonic inspection probe |
| CN201876438U (en) * | 2010-12-02 | 2011-06-22 | 核动力运行研究所 | Centering device for eddy current testing probe |
| CN102359802A (en) * | 2011-07-26 | 2012-02-22 | 上海交通大学 | Device for installing externally-clamping probes of portable ultrasonic flow meter |
| CN202281765U (en) * | 2011-10-17 | 2012-06-20 | 中广核检测技术有限公司 | Vortex detection probe for CEPR nuclear power plant control rod-drive mechanism |
| CN203658312U (en) * | 2013-12-30 | 2014-06-18 | 中核武汉核电运行技术股份有限公司 | Combined ultrasonic-eddy current detection probe clamping structure |
| CN103925004A (en) * | 2014-03-04 | 2014-07-16 | 中国矿业大学(北京) | Precision deformation monitoring method for surrounding rock of roadway |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179984A (en) * | 2019-07-03 | 2021-01-05 | 国核电站运行服务技术有限公司 | Ultrasonic probe device for pipeline detection |
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| CN105806956B (en) | 2019-08-13 |
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