CN105806956B - A kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination - Google Patents
A kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination Download PDFInfo
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- CN105806956B CN105806956B CN201410841436.3A CN201410841436A CN105806956B CN 105806956 B CN105806956 B CN 105806956B CN 201410841436 A CN201410841436 A CN 201410841436A CN 105806956 B CN105806956 B CN 105806956B
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Abstract
The present invention relates to a kind of probe assemblies of steam generator heat-transfer pipe ultrasonic examination, comprising: ultrasonic probe, probe gripper, guide head；The probe gripper is column structure, and outer diameter is slightly less than steam generator heat-transfer pipe internal diameter；Several uniform intervals and the radially probe mounting holes of break-through are axially arranged with along it, and ultrasonic probe inlay card is in the probe mounting holes；A cable aperture, the cable aperture and its axial one end break-through are additionally provided in probe gripper；Two petals are respectively engaged with probe gripper both ends；The 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；It is connect far from the petal equipped with cable aperture one end with guide head in probe gripper；Ultrasonic cable penetrates cable aperture from the petal that probe gripper is equipped with cable aperture one end and connect with ultrasonic probe.The present invention can be directed to steam generator heat-transfer pipe inspection, the especially inspection of tube expansion transition region special construction.
Description
Technical field
The present invention relates to nuclear engineering technical fields, and in particular to a kind of probe group of steam generator heat-transfer pipe ultrasonic examination
Part.
Background technique
Steam generator is the key equipment of power device, and heat-transfer pipe is the critical component of steam generator, steam generation
There are thousands of tiny heat-transfer pipes with the gap distribution of very little on tube sheet in device.By high temperature and pressure inside heat-transfer pipe when work
Primary side water carries out heat exchange by heat-transfer pipe and external secondary side water, while heat-transfer pipe also plays isolation.To guarantee
The safe operation of entire dynamical system needs to carry out periodic inspection to steam generator heat-transfer pipe.
Steam generator heat-transfer pipe in the process of running, the effects of by high temperature and pressure and alternating load, is easy to produce week
To, axial crack, burn into spot corrosion the defects of and caliber wall thickness change.Generally use EDDY CURRENT skill both at home and abroad at present
Art is implemented to examine to steam generator heat-transfer pipe, is checked using eddy current probe from heat transfer pipe internal surface, but be vortexed inspection
Looking into technology has its limitation to the inspection of heat transfer defective tube, evaluation and measurement, is still a great difficult problem of inspection.Steam hair
Raw device heat transfer bore is small, and tube wall is thin, and is sealed in inside steam generator, if using eddy detection technology, it is multiple to shape
Miscellaneous crack detection level is lower, to Flaw discrimination, quantitative inaccuracy；Tube expansion transition region caliber that heat-transfer pipe is connect with tube sheet and
Wall thickness constantly changes, and heat-transfer pipe and tube sheet both basic materials have differences, and not can guarantee using electric current when EDDY CURRENT
Its precision can will cause difficulty to EDDY CURRENT；And when carrying out eddy current inspection to heat-transfer pipe, can generally it select a plurality of types of
Detection probe is tested, and will definitely increase the risk of personnel and equipment caused by replacement probe.
Summary of the invention
The object of the present invention is to provide one kind to be directed to steam generator heat-transfer pipe inspection, the especially special knot of tube expansion transition region
The probe assembly of the steam generator heat-transfer pipe ultrasonic examination of the inspection of structure.
The invention is realized in this way a kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination, comprising: ultrasound is visited
Head, probe gripper, guide head；
The probe gripper is column structure, and outer diameter is slightly less than steam generator heat-transfer pipe internal diameter；It is axially arranged with along it
The probe mounting holes of several uniform intervals and radially break-through, ultrasonic probe inlay card is in the probe mounting holes；Probe
A cable aperture, the cable aperture and its axial one end break-through are additionally provided on fixture；Two petals are respectively engaged with probe gripper two
End；The petal is plastic hollow petal self-locking joint；The maximum outside diameter of petal expansion is slightly larger than in steam generator heat-transfer pipe
Diameter；It is connect far from the petal equipped with cable aperture one end with guide head in probe gripper；Ultrasonic cable is equipped with cable from probe gripper
The petal of hole one end penetrates cable aperture and connect with ultrasonic probe.
The column structure outside wall surface of the probe gripper is opened there are two radial slot, which in axial direction extends and in rectangle
Plane opens the probe mounting holes there are five uniform intervals and radial break-through in the slot, and ultrasonic probe inlay card is in the probe
Mounting hole.
The ultrasonic probe includes axial oblique incidence probe, longitudinal wave normal probe, circumferential oblique incidence probe；
Two axial oblique incidence probes, a longitudinal wave normal probe, two circumferential oblique incidence probes are sequentially embedded described five
In probe mounting holes；The probe detection faces that two axial oblique incidence probes, a longitudinal wave normal probe, two circumferential oblique incidences are popped one's head in
It is concordant with the rectangle plane of a slot.
The coniform plastic body of guide head, outer diameter are less than steam generator heat-transfer pipe internal diameter.
The invention has the advantages that
(1) present invention uses dedicated ultrasonic probe, i.e. high-frequency narrow-pulse point focusing water logging ultrasonic probe, can be to heat transfer
Implement full volumetric scanning inside pipe, can be avoided near field region influence, high resolution of popping one's head in.By dividing ultrasound acquisition data
Analysis can accurately find flaw indication, improve defect detection rate, and carry out qualitative analysis to defect, carry out to volume flaw
Linear measure longimetry carries out height and linear measure longimetry to axial crack and circumferential crack.Trommel can accurately be determined, and
The thinned size of measurement.
(2) present invention uses dedicated probe gripper, and water logging ultrasonic probe is installed in probe gripper, can be with certain
Refraction angle is incident on inside workpiece, different according to the directions of probe mounting holes, may be implemented to carrying out not Tongfang in heat-transfer pipe
Scanning is carried out to defect, while longitudinal wave normal probe and multiple angle probes being installed, longitudinal wave normal probe can detecte heat-transfer pipe thickness of pipe wall
The variation of degree, oblique incidence probe can detecte crackle and corrosion class defect on any direction, and carry out to defect qualitative and fixed
Amount；The risk for reducing personnel and equipment caused by replacement probe, saves the review time, improves and checks efficiency.
Detailed description of the invention
Fig. 1 is the probe assembly structure and application schematic diagram of vapour generator heat-transfer pipe ultrasonic examination of the present invention；
Fig. 2 is the probe gripper schematic diagram of the probe assembly of vapour generator heat-transfer pipe ultrasonic examination of the present invention；
Fig. 3 is that incidence angle calculates schematic diagram in ultrasonic probe axial direction oblique incidence probe water；
Fig. 4 is that incidence angle and eccentricity calculate schematic diagram in ultrasonic probe circumferential direction oblique incidence probe water；
In figure, 1 probe assembly；2 ultrasonic probes；3 probe grippers；4 petals；5 ultrasonic cables；6 cable aperture；7 is axial oblique
Penetrate probe；8 longitudinal wave normal probes；9 circumferential oblique incidence probes；10 guide heads.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples:
The probe assembly of a kind of steam generator heat-transfer pipe ultrasonic examination of the invention, comprising: ultrasonic probe 2, probe clip
Have 3, guide head 10；
Probe gripper 3 is column structure, and outer diameter is slightly less than steam generator heat-transfer pipe internal diameter；Five are axially arranged with along it
The probe mounting holes of uniform intervals and radially break-through；
Specifically, the outside wall surface of column structure is opened there are two radial slot, which in axial direction extends and be in rectangle plane,
The probe mounting holes there are five uniform intervals and radial break-through are opened in the slot；
A cable aperture 6 is additionally provided in probe gripper 3, the cable aperture 6 and its axial one end break-through；
Ultrasonic probe 2 includes axial oblique incidence probe 7, longitudinal wave normal probe 8, circumferential oblique incidence probe 9；
Two axial circumferential oblique incidences probes 9 of oblique incidences probe 7, one longitudinal wave normal probes 8, two are sequentially embedded described five
In a probe mounting holes；The probe of two axial circumferential oblique incidences probes 9 of oblique incidences probe 7, one longitudinal wave normal probes 8, two
Detection faces are concordant with the rectangle plane of a slot；
Two petals 4 are respectively engaged with 3 both ends of probe gripper；The petal 4 is plastic hollow petal self-locking joint；Petal
The maximum outside diameter of 4 expansions is slightly larger than steam generator heat-transfer pipe internal diameter；
It is connect far from the petal 4 equipped with cable aperture one end with guide head 10 in probe gripper 3；
The coniform plastic body of guide head 10, outer diameter are less than steam generator heat-transfer pipe internal diameter；
Ultrasonic cable 5 penetrates cable aperture 6 from the petal 4 that probe gripper 3 is equipped with cable aperture one end and connect with ultrasonic probe 2.
For steam generator heat-transfer pipe ultrasonic examination, the probe and component system of design may be implemented multiple probes and passing
Implement the positive and negative both direction inspection of circumferential and axial in heat pipe simultaneously.
This kind probe and component system 1 are mainly made of ultrasonic probe 2, probe gripper 3, petal 4, ultrasonic cable 5 (see figure
1)。
Ultrasonic probe 2: being directed to steam generator heat-transfer pipe ultrasonic examination, designs multi-channel high frequency burst pulse point focusing longitudinal wave
Normal probe.
The selection of probe chip, frequency and frequency bandwidth: heat transfer tube wall is thin, and probe wafer size can choose and wall thickness
With the wafer size of the order of magnitude.Because minimum will detect the crackle of 10% height of wall thickness, then frequency probe at least should be 15MHz,
Choosing the less probe of periodicity can be improved sound beam direction resolution ratio.
Determine water layer thickness: water logging ultrasonic examination, water layer thickness are important design parameter.Avoid hydrosphere surface wave to ultrasound
The influence of signal designs suitable water layer thickness, guarantees the triple reflection wave of longitudinal wave normal probe and the secondary counter of oblique incidence probe
Ejected wave is between first time hydrosphere surface wave and second of hydrosphere surface wave.
Focal length determines: heat transfer tube configuration is special, designs point focusing probe, selects suitable focal range covering total wall thickness,
Improve volumetric defect, the positioning of circumferential and axial crackle and quantitative accuracy.
Probe gripper 3: according to the requirement of water logging ultrasonic examination, the probe gripper of design specialized.Probe gripper includes cable
Hole 6, axial oblique incidence probe mounting holes 7,9 four part composition of longitudinal wave normal probe mounting hole 8 and circumferential oblique incidence probe mounting holes.
As shown in Figure 2, Fig. 3 is that incidence angle calculates schematic diagram in axial oblique incidence probe water to probe gripper, and Fig. 4 is circumferential oblique incidence probe
Incidence angle and eccentricity calculate schematic diagram in water.
Axial oblique incidence probe 7 uses identical refraction angle, angle β with circumferential oblique incidence probe 9.It can be according to super
Refraction angle of the sonic probe acoustic beam in heat transfer tube workpiece calculates the incidence angle θ, that is, mounting hole tilt angle of probe in water, leads to
Cross following formula calculating:
Incidence angle θ=arcsin (CW*sin β/CS)
Wherein: CW indicates the velocity of sound in water；
CS indicates the angled beam velocity of sound in heat-transfer pipe.
The center of 7 mounting holes of axial oblique incidence probe and heat transfer tube hub are coplanar, then the eccentricity X=0mm of mounting hole；
The center of the off-centring heat-transfer pipe of 9 mounting holes of circumferential oblique incidence probe can according to the following formula install circumferential oblique incidence
The distance that heat transfer tube hub is deviateed in hole is calculated:
Eccentricity X=sin θ * R
Wherein: θ indicates incidence angle in water；
R indicates heat transfer bore.
Petal 4: probe gripper 3, ultrasonic probe 2 are connected with ultrasonic cable 5 by petal, it is whole to form probe assembly
Structure.The outer diameter and heat transfer bore of petal 4 are adapted, can be with the center of adjust automatically probe assembly and heat transfer by petal 4
Tube hub coincides, and plays the role of support probe and component.
Ultrasonic cable 5: the stub cable in probe assembly, a branch of totally 5, stub cable one end passes through cable aperture on fixture and surpasses
Sonic probe is connected, and the other end is connect by cable connector connector with Ultrasound Instrument, realizes the conduction of ultrasonic signal, acquires in data
Signal is transmitted in the process to ultrasound acquisition software.
Claims (2)
1. a kind of probe assembly of steam generator heat-transfer pipe ultrasonic examination, it is characterised in that: include: ultrasonic probe, probe clip
Tool, guide head；
The probe gripper is column structure, and outer diameter is slightly less than steam generator heat-transfer pipe internal diameter；The column of the probe gripper
Shape structure outside wall surface is opened there are two radial slot, which in axial direction extends and be in rectangle plane, opened in the slot there are five
Uniform intervals and the probe mounting holes of radial break-through, ultrasonic probe inlay card is in the probe mounting holes；It is additionally provided in probe gripper
One cable aperture, the cable aperture and its axial one end break-through；Two petals are respectively engaged with probe gripper both ends；The 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；In probe gripper
It is connect far from the petal equipped with cable aperture one end with guide head；Ultrasonic cable is worn from the petal that probe gripper is equipped with cable aperture one end
Enter cable aperture to connect with ultrasonic probe；
The ultrasonic probe includes axial oblique incidence probe, longitudinal wave normal probe, circumferential oblique incidence probe；Two axial oblique incidences are visited
Head, a longitudinal wave normal probe, two circumferential oblique incidence probes are sequentially embedded in the probe mounting holes；Two axial oblique incidences are visited
Head, a longitudinal wave normal probe, the probe detection faces of two circumferential oblique incidence probes are concordant with the rectangle plane of a slot；
Axial oblique incidence probe uses identical refraction angle, angle β with circumferential oblique incidence probe；The incidence of probe in water
Angle θ, that is, mounting hole tilt angle, is calculated by the following formula: incidence angle θ=arcsin (CW * sin β/CS), in which: CW table
Show the velocity of sound in water；CS indicates the angled beam velocity of sound in heat-transfer pipe；
The center of axial oblique incidence probe mounting holes and heat transfer tube hub are coplanar, then eccentricity X=0mm of mounting hole；It is circumferential oblique
Circumferential oblique incidence mounting hole is deviateed and is conducted heat according to the following formula in the center of the off-centring heat-transfer pipe of incident probe mounting hole
The distance of tube hub is calculated: eccentricity X=sin θ * R；Wherein: θ indicates incidence angle in water；R indicates heat transfer bore.
2. the probe assembly of steam generator heat-transfer pipe ultrasonic examination described in accordance with the claim 1, it is characterised in that: described to lead
It is coniform plastic body to head, outer diameter is less than steam generator heat-transfer pipe internal diameter.
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| Application Number | Priority Date | Filing Date | Title |
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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 CN105806956A (en) | 2016-07-27 |
| CN105806956B true CN105806956B (en) | 2019-08-13 |
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| 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 |
Citations (7)
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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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925004B (en) * | 2014-03-04 | 2016-01-06 | 中国矿业大学(北京) | A kind of deformation of the surrounding rock in tunnel accurate monitoring method |
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2014
- 2014-12-30 CN CN201410841436.3A patent/CN105806956B/en active Active
Patent Citations (7)
| 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 |
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| CN105806956A (en) | 2016-07-27 |
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