CN106932470B - Probe transmission device for vortex detection of heat transfer tube of steam generator - Google Patents
Probe transmission device for vortex detection of heat transfer tube of steam generator Download PDFInfo
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- CN106932470B CN106932470B CN201511027248.8A CN201511027248A CN106932470B CN 106932470 B CN106932470 B CN 106932470B CN 201511027248 A CN201511027248 A CN 201511027248A CN 106932470 B CN106932470 B CN 106932470B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention belongs to the nondestructive testing technology of a steam generator heat transfer tube of a nuclear power station, and particularly discloses a probe transmission device for vortex testing of the steam generator heat transfer tube, which comprises a main transmission box and a rotary transmission box, wherein a first main transmission shaft and a second main transmission shaft are arranged on the main transmission box; the transmission shaft drives the main transmission gear and the rotary transmission gear to rotate simultaneously, so that the main transmission shaft of the main transmission box and the rotary transmission shaft of the rotary transmission box are driven to rotate simultaneously, the rotary transmission box can rotate integrally relative to the main transmission box simultaneously, and the probe is arranged on the transmission shaft, so that the device can collect eddy current signals of the heat transfer pipe.
Description
Technical Field
The invention belongs to nondestructive testing technology of a steam generator heat transfer tube of a nuclear power station, and particularly relates to a transmission device of a vortex flow detection probe of the steam generator heat transfer tube.
Background
In a nuclear power plant, steam generator heat transfer tubes are the pressure boundary of the primary equipment and reactor cooling system of the nuclear power plant, with the pressure boundary area accounting for over 70% of the primary circuit boundary. Because the heat transfer pipes are all thin-wall pipes with the thickness of about 1mm and the operation working condition is very bad, the heat transfer pipes are the weakest links of the pressure boundary of the primary circuit. Statistics of international nuclear power operation data show that more than 50% of heat transfer tubes are damaged to different degrees in all the steam generators. The nuclear power countries at home and abroad regularly implement pre-service inspection and in-service inspection on the steam generator heat transfer pipe.
In the eddy current inspection of a heat transfer tube of a steam generator, an eddy current detection probe needs to pass through the heat transfer tube, and eddy current signals are acquired by the heat transfer tube in the process of pulling back the probe. It is therefore desirable to design a drive structure for an eddy current probe that meets the above-described requirements.
Disclosure of Invention
The invention aims to provide a probe transmission device for vortex detection of a heat transfer pipe of a steam generator, which is used for collecting vortex signals of the heat transfer pipe when a vortex probe passes through the heat transfer pipe.
The technical scheme of the invention is as follows:
the probe transmission device for vortex detection of the heat transfer tube of the steam generator comprises a main transmission box and a rotary transmission box, wherein the rotary transmission box can rotate relative to the main transmission box around the rotation center of the main transmission box, a first main transmission shaft and a second main transmission shaft are arranged on the main transmission box, the rotary transmission box is positioned between the first main transmission shaft and the second main transmission shaft, the rotation center is the middle position of the first main transmission shaft and the second main transmission shaft, and certain gaps are reserved between the side surface of the rotary transmission box and the first main transmission shaft and the second main transmission shaft respectively; the rotary transmission box is provided with a first rotary transmission shaft and a second rotary transmission shaft, and the midpoint of the connecting line of the first rotary transmission shaft and the second rotary transmission shaft is the rotation center; the first main transmission shaft, the second main transmission shaft, the first rotary transmission shaft and the second rotary transmission shaft extend out of the box body and are arranged in an X shape, and the end parts of the 4 transmission shafts are distributed on 4 vertexes of the X shape;
the transmission shaft is partially arranged in the main transmission box, the other part of the transmission shaft is arranged in the rotary transmission box, a main transmission gear and a rotary transmission gear are respectively fixedly arranged at two ends of the transmission shaft, the main transmission gear is respectively meshed with a first main transmission gear fixedly arranged on the first main transmission shaft and a main transmission intermediate gear arranged in the main transmission box, and meanwhile, the main transmission intermediate gear is meshed with a second main transmission gear fixedly arranged on the upper part of the second main transmission shaft; the rotary transmission gear is respectively meshed with a second rotary gear fixedly arranged on the second rotary transmission shaft and a rotary intermediate gear arranged in the rotary transmission box, and meanwhile, the rotary intermediate gear is meshed with a first rotary gear fixedly arranged on the first rotary transmission shaft.
In the probe transmission device for vortex detection of the heat transfer tube of the steam generator, the probe transmission device comprises a transmission shaft, a transmission shaft and a transmission shaft, wherein the transmission shaft is arranged on the transmission shaft, the transmission shaft is connected with the transmission shaft, the: the main transmission case on processing have the mounting groove, the processing has protruding tip on the rotatory transmission case, protruding tip passes through the bearing and installs in the mounting groove on the main transmission case.
In the probe transmission device for vortex detection of the heat transfer tube of the steam generator, the probe transmission device comprises a transmission shaft, a transmission shaft and a transmission shaft, wherein the transmission shaft is arranged on the transmission shaft, the transmission shaft is connected with the transmission shaft, the: and an air cylinder is arranged outside the rotary transmission case and drives the rotary transmission case to rotate relative to the main transmission case.
In the probe transmission device for vortex detection of the heat transfer tube of the steam generator, the probe transmission device comprises a transmission shaft, a transmission shaft and a transmission shaft, wherein the transmission shaft is arranged on the transmission shaft, the transmission shaft is connected with the transmission shaft, the: the transmission shaft is provided with a bevel gear, and the bevel gear is connected with the driving mechanism.
In the probe transmission device for vortex detection of the heat transfer tube of the steam generator, the probe transmission device comprises a transmission shaft, a transmission shaft and a transmission shaft, wherein the transmission shaft is arranged on the transmission shaft, the transmission shaft is connected with the transmission shaft, the: the first main transmission shaft, the second main transmission shaft, the first rotary transmission shaft and the second rotary transmission shaft are all provided with probes, and rubber wheels are arranged outside the probes.
In the probe transmission device for vortex detection of the heat transfer tube of the steam generator, the probe transmission device comprises a transmission shaft, a transmission shaft and a transmission shaft, wherein the transmission shaft is arranged on the transmission shaft, the transmission shaft is connected with the transmission shaft, the: in the X-shaped arrangement, an upper pinch roller cover is arranged outside the main transmission shaft and the rotary transmission shaft which are adjacent to each other at the upper part, a lower pinch roller cover is arranged outside the main transmission shaft and the rotary transmission shaft which are adjacent to each other at the lower part, and the upper pinch roller cover and the lower pinch roller cover surround the transmission shaft which is arranged in the X-shaped arrangement.
The invention has the beneficial effects that:
through the design transmission shaft, drive the main drive gear and the rotation transmission gear that link to each other with the transmission shaft and rotate simultaneously, therefore drive the main drive shaft of main transmission case and the rotation transmission shaft of rotation transmission case simultaneously to because main transmission case and rotation transmission case bearing installation, drive rotation transmission case through cylinder or other drive structure, then rotation transmission case can be through the transfer sleeve with main transmission case fixed connection between first transmission shaft and second transmission shaft in a small circle rotation. Namely, the rotary transmission case integrally rotates relative to the main transmission case, and simultaneously, the two main transmission shafts and the two rotary transmission shafts are arranged in an X shape and rotate.
If the rubber wheels are arranged on the transmission shaft and the rotary transmission shaft, the rubber wheels envelop the probe on the installation shaft, and the pressing force between the adjacent rubber wheels can be adjusted by adjusting the rotating angle of the rotary transmission box relative to the main transmission box, so that the rubber wheels press the probe, and the vortex probe is prevented from being extruded from the rubber wheels to be bent and damaged.
If the upper and lower pinch roller covers are arranged outside the rubber wheel, the upper pinch roller cover and the lower pinch roller cover enclose the transmission shaft arranged in an X shape, so that the rubber wheel and the probe are protected. In addition, the rotary transmission case is driven to rotate relative to the main transmission case, two sides of a structure formed by the upper pinch roller cover and the lower pinch roller cover are respectively opened, and the upper pinch roller cover and the lower pinch roller cover are opened in space, so that the rubber wheel and the probe in the inner part can be quickly replaced.
Drawings
FIG. 1a is a schematic diagram of a probe drive for vortex detection of a steam generator heat transfer tube;
FIG. 1b is a schematic diagram of a main gearbox, rotary gearbox position and X-arrangement;
FIG. 2 is a schematic diagram of the internal structure of the main transmission case;
FIG. 3 is a schematic diagram of the internal structure of a rotary transmission case;
FIG. 4 is a schematic diagram of upper and lower puck shields;
in the figure: 1. a main transmission case; 2. a rotary transmission case; 3. a first main drive shaft; 4. a second main drive shaft; 5. a first rotary drive shaft; 6. a second rotary drive shaft; 7. a main transmission case end cover; 8. a transmission shaft; 9. bevel gears; 10. a first sleeve; 11. a second sleeve; 12. rotating the transmission case end cap; 13. a main transmission intermediate gear; 14. a first main transmission gear; 15. a second main transmission gear; 16. a main transmission gear; 17. a rotary transmission gear; 18. a first long sleeve; 19. a second long sleeve; 20. a driving sleeve; 21. a first rotary gear; 22. a second rotary gear; 23. rotating the intermediate gear; 24. an upper pressing wheel cover; 25. pressing down the wheel cover; 26. and (3) a cylinder.
Detailed Description
The invention is further illustrated by the following figures and detailed description.
As shown in fig. 1a and 1b, the transmission device comprises a main transmission case 1 and a rotary transmission case 2, wherein two main transmission shafts 3 and 4 are installed on the main transmission case 1, the middle part of the rotary transmission case 2 is positioned between the first main transmission shaft 3 and the second main transmission shaft 4, and the rotation center is the middle position of the first main transmission shaft 3 and the second main transmission shaft 4. The side surface of the rotary transmission case 2 and the first main transmission shaft 3 and the second main transmission shaft 4 respectively keep a certain clearance, so that the rotary transmission case 2 rotates around the rotation center in a small range between the first main transmission shaft 3 and the second main transmission shaft 4, the range of the rotation angle is limited by the size of the clearance, and the rotation angle is generally 10-12 DEG
Two rotary transmission shafts 5 and 6 are arranged on the rotary transmission case 2, the first main transmission shaft 3, the second main transmission shaft 4, the first rotary transmission shaft 5 and the second rotary transmission shaft 6 form an X-shaped arrangement, and the end parts of the 4 transmission shafts are distributed on 4 vertexes of the X.
As shown in fig. 2, the main transmission case 1 is provided with a mounting groove, the rotary transmission case 2 is provided with a protruding end, and the protruding end is mounted in the mounting groove on the main transmission case 1 through a bearing, i.e. the rotary transmission case 2 can rotate around the main transmission case 1 through the protruding end.
The mounting groove is internally provided with a mounting hole, and the protruding end part is provided with a mounting hole. A transmission shaft 8 is arranged in the main transmission case 1 and the rotary transmission case 2, and a bevel gear 9 and a transmission shaft sleeve 20 are sleeved outside the transmission shaft 8. The drive shaft 8 is meshed with a bevel gear 9.
The driving shaft sleeve 20 is installed through the matching of the installation groove and the installation hole of the protruding end part, one part of the driving shaft 8 is positioned in the main driving box 1, the end part is in bearing connection with the end cover 7 of the main driving box, the other part is positioned in the rotary driving box 2, and the end part is in bearing connection with the end cover 12 of the rotary driving box. The part of the transmission shaft 8 in the main transmission case 1 is fixedly provided with a main transmission gear 16, and the part of the transmission shaft 8 in the rotary transmission case 2 is fixedly provided with a rotary transmission gear 17. The transmission shaft 8 is in bearing connection with the transmission shaft sleeve 20, the transmission shaft sleeve 20 is in bearing connection with the rotary transmission case 2, and the transmission shaft sleeve 20 is fixedly arranged with the main transmission case 1, so that the transmission shaft 8 can rotate in the transmission shaft sleeve 20, the transmission shaft sleeve 20 can rotate in the rotary transmission case 2, and the transmission shaft 8 rotates relative to the main transmission case 1 fixedly connected with the transmission shaft sleeve 20.
The two main transmission shafts are a first main transmission shaft 3 and a second main transmission shaft 4, which are positioned on two sides of a transmission shaft 8 and are symmetrically arranged relative to the transmission shaft 8. The first long shaft sleeve 18 is arranged outside the first main transmission shaft 3 through a bearing, the first long shaft sleeve 18 is fixedly arranged with the main transmission box 1, the first main transmission gear 14 is fixedly arranged on the first main transmission shaft 3, and the bottom of the first main transmission shaft 3 is in bearing connection with the main transmission box end cover 7. The first long shaft sleeve 18 extends out of the main transmission case 1, the first main transmission shaft 3 extends out of the first long shaft sleeve 18, the first sleeve 10 is installed on the extending part through a bearing, and the first sleeve 10 is fixedly connected with the first long shaft sleeve 18. The second main drive shaft 4 is mounted identically to the first main drive shaft 3. The second main transmission shaft 4 is externally provided with a second long shaft sleeve 19 through a bearing, part of the second long shaft sleeve 19 extends out, the bearing is provided with a second sleeve 11, and the second sleeve 11 is fixedly connected with the second long shaft sleeve 19. The second long shaft sleeve 19 extends out of the main transmission case 1 partially and is fixedly mounted with the main transmission case 1. The second main transmission shaft 4 is fixedly provided with a second main transmission gear 15, and the bottom of the second main transmission shaft 4 is in bearing connection with the main transmission box end cover 7.
Meshing relationship of gears: an intermediate gear shaft is installed between the drive shaft 8 and the second main drive shaft 4, through which a main drive intermediate gear 13 is installed, the main drive intermediate gear 13 being meshed with the above-described main drive gear 16 and second main drive gear 15, respectively. The main drive gear 16 meshes with the first main drive gear 14.
The bevel gear 9 is driven, the transmission shaft 8 meshed with the bevel gear 9 is driven to rotate, the main transmission gear 16 is driven to rotate, the first main transmission gear 14 and the main transmission intermediate gear 13 are meshed with the bevel gear 9, and the main transmission intermediate gear 13 drives the second main transmission gear 15 to rotate, so that the first main transmission shaft 3 and the second main transmission shaft 4 are driven to rotate. At the same time, the rotation of the transmission shaft 8 also drives the rotation of the rotation transmission gear 17. As is clear from the above engagement relationship, since the main drive intermediate gear 13 is designed, the rotation directions of the first main drive shaft 3 and the second main drive shaft 4 are opposite, the rotation directions of the second main drive shaft 4 and the drive shaft 8 are identical, and the rotation directions of the first main drive shaft 3 and the drive shaft 8 are opposite.
As shown in fig. 3, the first rotary drive shaft 5 and the second rotary drive shaft 6 of the rotary drive case 2 are disposed symmetrically with respect to the drive shaft 8 on both sides of the drive shaft 8. The first rotary transmission shaft 5, the rotary transmission box end cover 12 and the rotary transmission box 2 are respectively installed through bearings, a first rotary gear 21 is fixedly installed at the lower end of the first rotary transmission shaft, and a part of the first rotary transmission shaft 5 extends out of the rotary transmission box end cover 12. The second rotary transmission shaft 6, the rotary transmission box end cover 12 and the rotary transmission box 2 are respectively installed through bearings, a second rotary gear 22 is fixedly installed at the lower end of the second rotary transmission shaft 6, and part of the second rotary transmission shaft 6 extends out of the rotary transmission box end cover 12.
An intermediate gear shaft is mounted between the first rotary drive shaft 5 and the drive shaft 8, which gear shaft is connected to the rotary drive housing 2 via bearings, the gear shaft being fixedly mounted with a rotary intermediate gear 23.
Meshing relationship of gears: the rotary intermediate gear 23 is engaged with the first rotary gear 21 and the transmission shaft 8 on both sides, and the transmission shaft 8 and the second rotary gear 22 are engaged.
After the drive transmission shaft 8 drives the rotation transmission gear 17 to rotate, the rotation intermediate gear 23 rotates due to the engagement of the gears, and the second rotation gear 22 rotates at the same time, the rotation intermediate gear 23 drives the first rotation gear 21 engaged therewith to rotate, so that the first rotation transmission shaft 5 and the second rotation transmission shaft 6 simultaneously rotate. And, as in the above-described rotational relationship of the two main drive shafts in the main drive housing 1, since the rotary intermediate gear 23 is designed, the rotational directions of the first rotary drive shaft 5 and the second rotary drive shaft 6 are opposite, and the rotational directions of the first rotary drive shaft 5 and the drive shaft 8 are the same, and the rotational directions of the second rotary drive shaft 6 and the drive shaft 8 are opposite.
The transmission relation of the whole device is as follows: the rotation directions of the second main drive shaft 4 and the drive shaft 8 are identical, and the rotation directions of the first main drive shaft 3 and the drive shaft 8 are opposite. The first rotary drive shaft 5 and the drive shaft 8 rotate in the same direction and the second rotary drive shaft 6 and the drive shaft 8 rotate in opposite directions.
The probe is arranged on the transmission shaft and the rotary transmission shaft, the rubber wheel is arranged outside the probe, the probe on the installation shaft is enveloped by the rubber wheel, and the pressing force between the adjacent rubber wheels can be adjusted by adjusting the rotating angle of the rotary transmission box relative to the main transmission box, so that the rubber wheels press the probe, and the vortex probe is prevented from being extruded from the rubber wheels to be bent and damaged.
As shown in fig. 4, an upper pressure wheel cover 24 is mounted above the second main drive shaft 4 and the second rotary drive shaft 6, a lower pressure wheel cover 25 is mounted below the first main drive shaft 3 and the first rotary drive shaft 5, and the upper and lower pressure wheel covers 24, 25 are mounted outside the rubber wheels. The transmission shaft that upper pinch roller cover 24 and lower pinch roller cover 25 will "X" arrangement surrounds, and when cylinder 26 drive rotary transmission case 2 rotated for main transmission case 1, upper pinch roller cover 24 and lower pinch roller cover 25 enclose the structure both sides that become and open respectively, and upper and lower pinch roller cover opens the space, can change inside rubber wheel and probe rapidly.
Claims (5)
1. The utility model provides a probe transmission for steam generator heat transfer pipe eddy current testing, includes main transmission case (1) and rotatory transmission case (2), rotatory transmission case (2) can rotate its rotation center, its characterized in that for main transmission case (1): the main transmission box (1) is provided with a first main transmission shaft (3) and a second main transmission shaft (4), the rotary transmission box (2) is positioned between the first main transmission shaft (3) and the second main transmission shaft (4), the rotation center is the middle position of the first main transmission shaft (3) and the second main transmission shaft (4), and certain gaps are reserved between the side surface of the rotary transmission box (2) and the first main transmission shaft (3) and the second main transmission shaft (4) respectively; the rotary transmission box (2) is provided with a first rotary transmission shaft (5) and a second rotary transmission shaft (6), and the midpoint of the connecting line of the first rotary transmission shaft (5) and the second rotary transmission shaft (6) is the rotation center; the first main transmission shaft (3), the second main transmission shaft (4), the first rotary transmission shaft (5) and the second rotary transmission shaft (6) extend out of the box body and are arranged in an X shape, and the end parts of the 4 transmission shafts are distributed on 4 vertexes of the X shape;
the device comprises a main transmission box (1), a rotary transmission gear (17) and a transmission shaft (8), wherein the transmission shaft (8) is partially arranged in the main transmission box (1), the rotary transmission box (2) is partially arranged in the rotary transmission box, a main transmission gear (16) and the rotary transmission gear (17) are respectively and fixedly arranged at two ends of the transmission shaft (8), the main transmission gear (16) is respectively meshed with a first main transmission gear (14) fixedly arranged on the first main transmission shaft (3) and a main transmission intermediate gear (13) arranged in the main transmission box (1), and meanwhile, the main transmission intermediate gear (13) is meshed with a second main transmission gear (15) fixedly arranged at the upper part of the second main transmission shaft (4); the rotary transmission gear (17) is respectively meshed with a second rotary gear (22) fixedly arranged on the second rotary transmission shaft (6) and a rotary intermediate gear (23) arranged in the rotary transmission box (2), and meanwhile, the rotary intermediate gear (23) is meshed with a first rotary gear (21) fixedly arranged on the first rotary transmission shaft (50).
2. A probe transmission for vortex detection of a steam generator heat transfer tube as claimed in claim 1, wherein: the main transmission case (1) is provided with a mounting groove, the rotary transmission case (2) is provided with a protruding end part, and the protruding end part is mounted in the mounting groove on the main transmission case (1) through a bearing.
3. A probe transmission for vortex detection of a steam generator heat transfer tube as claimed in claim 1, wherein: the rotary transmission case (2) is provided with an air cylinder, and is driven to rotate relative to the main transmission case (1).
4. A probe transmission for vortex detection of a steam generator heat transfer tube as claimed in any one of claims 1 to 3, wherein: the first main transmission shaft (3), the second main transmission shaft (4), the first rotary transmission shaft (5) and the second rotary transmission shaft (6) are respectively provided with probes, and rubber wheels are arranged outside the probes.
5. A probe transmission for vortex detection of a steam generator heat transfer tube as defined in claim 4 wherein: in the X-shaped arrangement, an upper pinch roller cover (24) is arranged outside the upper adjacent main transmission shaft and the rotary transmission shaft, a lower pinch roller cover (25) is arranged outside the lower adjacent main transmission shaft and the rotary transmission shaft, and the upper pinch roller cover (24) and the lower pinch roller cover (25) surround the transmission shaft in the X-shaped arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027248.8A CN106932470B (en) | 2015-12-31 | 2015-12-31 | Probe transmission device for vortex detection of heat transfer tube of steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027248.8A CN106932470B (en) | 2015-12-31 | 2015-12-31 | Probe transmission device for vortex detection of heat transfer tube of steam generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106932470A CN106932470A (en) | 2017-07-07 |
| CN106932470B true CN106932470B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511027248.8A Active CN106932470B (en) | 2015-12-31 | 2015-12-31 | Probe transmission device for vortex detection of heat transfer tube of steam generator |
Country Status (1)
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| CN (1) | CN106932470B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932471B (en) * | 2015-12-31 | 2023-12-15 | 核动力运行研究所 | Probe driving device for vortex detection of heat transfer tube of steam generator |
| CN109142513B (en) * | 2018-09-05 | 2023-10-24 | 中国电建集团山东电力建设第一工程有限公司 | Probe driving device and method for vortex detection by condenser cooling pipe external penetration method |
| CN110375630B (en) * | 2019-07-23 | 2021-02-09 | 杭州申昊科技股份有限公司 | Adjusting structure of eddy current sensor |
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| CN105158337A (en) * | 2015-10-18 | 2015-12-16 | 东北石油大学 | Automatic detector for welding line of storage tank bottom plate based on wireless transmission |
| CN205538827U (en) * | 2015-12-31 | 2016-08-31 | 核动力运行研究所 | A probe transmission for steam generator tubes eddy current inspection |
| CN106932471A (en) * | 2015-12-31 | 2017-07-07 | 核动力运行研究所 | A kind of probe drive device for steam generator heat-transfer pipe vortex detection |
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| EP0502592A1 (en) * | 1991-03-06 | 1992-09-09 | Mitsubishi Jukogyo Kabushiki Kaisha | An apparatus for inspecting the inner surface of a hole |
| JPH0656769A (en) * | 1992-08-10 | 1994-03-01 | Daicel Chem Ind Ltd | Method of selective photochemical reaction using tartaric acid derivative |
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| CN106932471A (en) * | 2015-12-31 | 2017-07-07 | 核动力运行研究所 | A kind of probe drive device for steam generator heat-transfer pipe vortex detection |
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| Publication number | Publication date |
|---|---|
| CN106932470A (en) | 2017-07-07 |
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