CN109444259B - Special-shaped pipe adsorption type eddy current array probe - Google Patents
Special-shaped pipe adsorption type eddy current array probe Download PDFInfo
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- CN109444259B CN109444259B CN201811574988.7A CN201811574988A CN109444259B CN 109444259 B CN109444259 B CN 109444259B CN 201811574988 A CN201811574988 A CN 201811574988A CN 109444259 B CN109444259 B CN 109444259B
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- 239000000523 sample Substances 0.000 title claims abstract description 130
- 238000001179 sorption measurement Methods 0.000 title abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 description 9
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
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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
- G01N27/9006—Details, e.g. in the structure or functioning of 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 technical field of nondestructive inspection application of nuclear power equipment, in particular relates to an adsorption type eddy current array probe for special-shaped pipes, and aims to solve the problems of structural characteristics and actual requirements of an outer sleeve of a fast reactor core assembly. The device is characterized by comprising an outer wall eddy current array probe and an inner wall eddy current array probe; the outer wall vortex array probe is arranged on the outer wall of the hexagonal tube; the inner wall vortex array probe is arranged on the inner wall of the hexagonal tube, and the inner wall vortex array probe and the outer wall vortex array probe are mutually attracted through the magnet, so that the outer wall vortex array probe, the inner wall vortex array probe and the hexagonal tube are tightly attached, and meanwhile detection of the inner wall and the outer wall of the hexagonal tube is achieved.
Description
Technical Field
The invention belongs to the technical field of nondestructive inspection application of nuclear power equipment, and particularly relates to an adsorption type eddy current array probe for a special-shaped pipe.
Background
The core assembly outer sleeve, hereinafter referred to as sleeve, is an important assembly for fast reactor operation in high temperature sodium medium environment, and is also a safety barrier for preventing nuclear leakage. In order to ensure safe and stable operation of the facility, the casing needs to be subjected to nondestructive testing after production is completed.
The casing has an equilateral hexagonal pipe structure, hereinafter referred to as a hexagonal pipe, and it is required to detect from the outside and the inside, to find defects such as cracks or abrasion on the surface and the inside, to find the position and the size of the defects, and to analyze the cause of the defects generated in the casing. Corresponding measures are formulated to avoid the secondary damage of the sleeve caused by the same process or other reasons, and the safe and reliable operation of the nuclear reactor is ensured.
Nondestructive inspection of casing using eddy current probes is one of the main methods for finding defects. Because the inspected area of the inner surface and the outer surface of the hexagonal tube is larger, if the single-point type eddy current probe technology is used, scanning needs to be respectively carried out from the outer surface and the inner surface of the hexagonal tube, because the effective inspection area covered by the single-point type probe inspection is less, each plane needs to be scanned repeatedly to cover the inspected surface, and the special probe for the corner must be replaced to complete the inspection when the position of the corner is reached. The entire inspection process takes a lot of time and the requirements for the scanning device are very high.
The invention relates to a novel mechanism for detecting and designing an eddy current array probe aiming at the inner surface and the outer surface of a hexagonal pipe or other special-shaped pipes. The inner surface vortex array probe and the outer surface vortex array probe in the prior art are required to be respectively installed on the outer wall scanning mechanical arm and the inner wall scanning mechanical long rod, and the defect is that the inner wall detection system and the outer wall detection system are two sets of equipment, and the inner wall detection system and the outer wall detection system are required to be respectively carried out on the two sets of systems when detecting the same pipe, so that the detection efficiency is low. In addition, the inner wall scanning mechanical long rod is driven by a motor to axially extend into the hexagonal tube to drive the probe to axially scan, the length of the long rod is fixed, and if the length of the hexagonal tube is greater than that of the long rod, the long rod cannot be inspected, so that the system has low flexibility. The novel structure adsorbs the inner and outer wall vortex array probe on the inner and outer pipe walls of the hexagonal pipe through magnetic adsorption and simultaneously carries out detection, does not need an inner surface scanning mechanical long rod detection system, improves the efficiency and flexibility of the detection system, and simultaneously reduces the development cost of equipment.
Disclosure of Invention
The invention aims at the structural characteristics and actual requirements of an outer sleeve of a fast reactor core assembly, and provides a novel eddy current array probe mechanism based on the prior art, which can realize simultaneous detection of an inner wall eddy current array probe and an outer wall eddy current array probe, eliminates an inner wall scanning mechanical long rod system, and improves the efficiency and the flexibility of a detection system.
The invention is realized in the following way:
an adsorption type eddy current array probe for special-shaped pipes comprises an outer wall eddy current array probe and an inner wall eddy current array probe; the outer wall vortex array probe is arranged on the outer wall of the hexagonal tube; the inner wall vortex array probe is arranged on the inner wall of the hexagonal tube, and the inner wall vortex array probe and the outer wall vortex array probe are mutually attracted through the magnet, so that the outer wall vortex array probe, the inner wall vortex array probe and the hexagonal tube are tightly attached, and meanwhile detection of the inner wall and the outer wall of the hexagonal tube is achieved.
The outer wall eddy current array probe comprises a front positive magnet module, a rear positive magnet module, an outer wall front pulley block module, an outer wall rear pulley block module and an outer wall array probe coil module; the front positive magnet module and the rear positive magnet module are opposite to the outer shape of the hexagonal tube, are V-shaped, magnetize in the direction perpendicular to the tube wall, and are magnet positive in the attaching direction with the tube wall; the front positive magnet module is arranged at the left end of the outer wall front pulley block module, and the rear positive magnet module is arranged at the right end of the outer wall rear pulley block module; the outer wall front pulley block module and the outer wall rear pulley block module are arranged at the left end and the right end of the outer wall array probe coil module, four groups of pulleys are arranged in total, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide.
The length of the outer wall rear pulley block module is larger than that of the outer wall front pulley block module.
The outer wall vortex array probe is mounted on the outer wall scanning mechanical arm, and the outer wall scanning mechanical arm moves left and right to carry out scanning.
The inner wall eddy current array probe comprises a front negative magnet module, a rear negative magnet module, an inner wall front pulley block module, an inner wall rear pulley block module and an inner wall array probe coil module; the front negative magnet module and the rear negative magnet module are opposite to the outer shape of the hexagonal tube, are V-shaped, magnetize in the direction perpendicular to the tube wall, and are attached to the tube wall in the direction of the negative magnet; the front negative pole magnet module is arranged at the left end of the inner wall front pulley block module, and the rear negative pole magnet module is arranged at the right end of the inner wall rear pulley block module; the inner wall front pulley block module and the inner wall rear pulley block module are arranged at the left end and the right end of the inner wall array probe coil module, four groups of pulleys are arranged, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide.
The length of the inner wall front pulley block module is larger than that of the inner wall rear pulley block module.
The driving force of the inner wall eddy current array probe is provided by the outer wall eddy current array probe after the two groups of modules of the front positive magnet module and the front negative magnet module and the rear positive magnet module and the rear negative magnet module are attracted mutually.
The lengths of the front positive magnet module, the front negative magnet module, the rear positive magnet module and the rear negative magnet module are equal, the lengths of the outer wall front pulley block module and the inner wall rear pulley block module are equal, and the lengths of the outer wall rear pulley block module and the inner wall front pulley block module are equal.
When the outer wall eddy current array probe and the inner wall eddy current array probe are sucked as described above, the positions of the outer wall array probe coil module and the inner wall array probe coil module are staggered.
The contact surfaces of the outer wall front pulley block module, the outer wall rear pulley block module, the inner wall front pulley block module, the inner wall rear pulley block module, the outer wall array probe coil module and the inner wall array probe coil module and the hexagonal pipe are all made of plastics.
The beneficial effects of the invention are as follows:
the core components of the outer wall eddy current array probe mechanism consist of an outer wall array probe coil module 5-1, a front positive magnet module 3-1, a rear positive magnet module 3-2, an outer wall front pulley block module 4-1 and an outer wall rear pulley block module 4-2. The front and rear positive magnet modules are opposite to the outer shape of the hexagonal tube, are V-shaped, magnetize in the direction perpendicular to the tube wall, and are in positive magnet with the attaching direction to the tube wall; the front pulley block module and the rear pulley block module of the outer wall are arranged on two sides of the plane of the profiling framework of the probe, four groups of pulleys are arranged, the pulleys slightly protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide. The outer wall eddy current array probe mechanism needs to be installed on an outer wall scanning mechanical arm, and scanning is implemented by moving the outer wall scanning mechanical arm left and right.
The core component of the inner wall eddy current array probe mechanism consists of an inner wall array probe coil module 5-2, a front negative magnet module 3-3, a rear negative magnet module 3-4, an inner wall front pulley block module 4-3 and an inner wall rear pulley block module 4-4. The front and rear negative pole magnet modules are also opposite to the external shape of the hexagonal tube, are V-shaped, magnetize in the direction perpendicular to the tube wall, and are magnet negative poles in the attaching direction with the tube wall; the inner wall front and rear pulley block modules are arranged on two sides of the plane of the probe profiling framework, four groups of pulleys are arranged, the pulleys slightly protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide. The driving force of the inner wall eddy current array probe mechanism is provided by the mutual attraction of the front and rear positive magnet modules and the front and rear negative magnet modules.
The novel eddy current array probe structure can be divided into an outer surface eddy current array probe 7 and an inner surface eddy current array probe 8. The array probe coil module is the same as the prior art, and adopts a profiling framework structure matched with the shape of the hexagonal tube, and the difference is that the inner wall coil module and the outer wall coil module are required to be arranged in a staggered manner at the arrangement position so as to ensure that coil excitation and receiving magnetic fields are not mutually interfered when detection is simultaneously implemented. The pulley block modules are arranged on the left side and the right side of the coil module, the magnet modules are arranged on the left side and the right side of the pulley block module, the pulley block modules are used for supporting the array probes on the inner wall and the outer wall after the magnet modules are adsorbed and freely sliding along the axial direction of the hexagonal tube, and meanwhile the magnet modules are limited to be directly contacted with the wall of the hexagonal tube. The inner wall array probe and the outer wall array probe can cover a sixth hexagonal tube inspected area when being inspected simultaneously, and one tube can be inspected after three round trips, so that the efficiency of the inspection system is improved. The magnetic adsorption mechanism is adopted to replace the long rod system of the inner wall scanning machine, so that the flexibility of the detection system is improved without being limited by the length of the long rod.
Drawings
FIG. 1 is a schematic diagram of the structure of an eddy current array probe of the present invention;
FIG. 2 is a schematic diagram of an outer wall eddy current array probe mechanism of the invention;
FIG. 3 is a schematic diagram of an outer wall eddy current array probe mechanism of the invention.
Wherein: 6. the device comprises a hexagonal tube, a 7-outer wall vortex array probe, a 8-inner wall vortex array probe, a 3-1 front positive magnet module, a 3-2 rear positive magnet module, a 3-3 front negative magnet module, a 3-4 rear negative magnet module, a 4-1 outer wall front pulley block module, a 4-2 outer wall rear pulley block module, a 4-3 inner wall front pulley block module, a 4-4 inner wall rear pulley block module, a 5-1 outer wall array probe coil module and a 5-2 inner wall array probe coil module.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the special-shaped pipe adsorption type eddy current array probe comprises an outer wall eddy current array probe 7 and an inner wall eddy current array probe 8. An outer wall eddy current array probe 7 is provided on the outer wall of the hexagonal tube 6. The inner wall vortex array probe 8 is arranged on the inner wall of the hexagonal tube 6, and the inner wall vortex array probe 7 and the outer wall vortex array probe 7 are mutually attracted through a magnet, so that the outer wall vortex array probe 7, the inner wall vortex array probe 8 and the hexagonal tube 6 are tightly attached, and meanwhile detection of the inner wall and the outer wall of the hexagonal tube 6 is achieved.
As shown in fig. 2, the outer wall eddy current array probe 7 includes a front positive magnet module 3-1, a rear positive magnet module 3-2, an outer wall front pulley block module 4-1, an outer wall rear pulley block module 4-2, and an outer wall array probe coil module 5-1. The front positive magnet module 3-1 and the rear positive magnet module 3-2 are opposite to the outer shape of the hexagonal tube, are V-shaped, are magnetized in the direction perpendicular to the tube wall, and are magnet positive in the direction of attaching to the tube wall; the front positive pole magnet module 3-1 is arranged at the left end of the outer wall front pulley block module 4-1, and the rear positive pole magnet module 3-2 is arranged at the right end of the outer wall rear pulley block module 4-2. The outer wall front pulley block module 4-1 and the outer wall rear pulley block module 4-2 are arranged at the left end and the right end of the outer wall array probe coil module 5-1, four groups of pulleys are arranged, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide. The length of the outer wall rear pulley block module 4-2 is longer than that of the outer wall front pulley block module 4-1. The outer wall vortex array probe 7 is installed on an outer wall scanning mechanical arm, and scanning is implemented by moving the outer wall scanning mechanical arm left and right. The outer wall array probe coil module 5-1 and the outer wall scanning mechanical arm are both existing devices.
As shown in fig. 3, the inner wall eddy current array probe 8 includes a front negative magnet module 3-3, a rear negative magnet module 3-4, an inner wall front pulley block module 4-3, an inner wall rear pulley block module 4-4, and an inner wall array probe coil module 5-2. The front negative pole magnet module 3-3 and the rear negative pole magnet module 3-4 are opposite to the outer shape of the hexagonal tube, are V-shaped, are magnetized in the direction perpendicular to the tube wall, and are magnet negative poles in the attaching direction with the tube wall; the front negative pole magnet module 3-3 is arranged at the left end of the inner wall front pulley block module 4-3, and the rear negative pole magnet module 3-4 is arranged at the right end of the inner wall rear pulley block module 4-4. The inner wall front pulley block module 4-3 and the inner wall rear pulley block module 4-4 are arranged at the left end and the right end of the inner wall array probe coil module 5-2, four groups of pulleys are arranged, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube during detection and can axially and freely slide. The length of the inner wall front pulley block module 4-3 is larger than that of the inner wall rear pulley block module 4-4. The driving force of the inner wall eddy current array probe 8 is provided by the outer wall eddy current array probe 7 after the two groups of modules of the front positive magnet module 3-1, the front negative magnet module 3-3, the rear positive magnet module 3-2 and the rear negative magnet module 3-4 are attracted mutually. The inner wall array probe coil module 5-2 is an existing device.
The lengths of the front positive pole magnet module 3-1, the front negative pole magnet module 3-3, the rear positive pole magnet module 3-2 and the rear negative pole magnet module 3-4 are equal, the lengths of the outer wall front pulley block module 4-1 and the inner wall rear pulley block module 4-4 are equal, and the lengths of the outer wall rear pulley block module 4-2 and the inner wall front pulley block module 4-3 are equal. When the outer wall eddy current array probe 7 and the inner wall eddy current array probe 8 are sucked, the positions of the outer wall array probe coil module 5-1 and the inner wall array probe coil module 5-2 are staggered.
In the embodiment, the contact surfaces of the outer wall front pulley block module 4-1, the outer wall rear pulley block module 4-2, the inner wall front pulley block module 4-3, the inner wall rear pulley block module 4-4, the outer wall array probe coil module 5-1, the inner wall array probe coil module 5-2 and the hexagonal tube 6 are all made of plastics.
When the six-angle tube detection device is used, the outer wall scanning mechanical arm is driven to attach the outer wall eddy current array probe to the outer wall of the six-angle tube, the front end inner wall mechanical arm is driven to extend the inner wall eddy current array probe into the front end tube orifice of the six-angle tube, the inner wall mechanical arm is loosened after the front negative magnet module and the front positive magnet module are externally overlapped, at the moment, under the action of magnetic force, the inner wall coil module and the outer wall coil module are tightly attached to the six-angle tube, the outer wall scanning mechanical arm is driven to carry out detection along the axial movement of the six-angle tube, when the rear end tube orifice of the six-angle tube is scanned, the rear end inner wall mechanical arm is driven to take out the inner wall eddy current array probe, the six-angle tube rotates to the next detection surface, and the six-angle tube is similarly acted to and fro three times to complete the detection of the whole six-angle tube.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the embodiments described above, and various modifications may be made without departing from the spirit of the present invention, within the knowledge of those skilled in the art. The invention may be practiced otherwise than as specifically described in the specification.
Claims (9)
1. An absorption type eddy current array probe for special-shaped pipes is characterized in that: the device comprises an outer wall eddy current array probe (7) and an inner wall eddy current array probe (8); the outer wall vortex array probe (7) is arranged on the outer wall of the hexagonal pipe (6); the inner wall vortex array probe (8) is arranged on the inner wall of the hexagonal tube (6), and the outer wall vortex array probe (7), the inner wall vortex array probe (8) and the hexagonal tube (6) are tightly attached through mutual attraction of the magnet and the outer wall vortex array probe (7), and meanwhile detection of the inner wall and the outer wall of the hexagonal tube (6) is achieved;
the outer wall eddy current array probe (7) comprises a front positive magnet module (3-1), a rear positive magnet module (3-2), an outer wall front pulley block module (4-1), an outer wall rear pulley block module (4-2) and an outer wall array probe coil module (5-1); the front positive magnet module (3-1) and the rear positive magnet module (3-2) are opposite to the outer shape of the hexagonal tube, are V-shaped, are magnetized in the direction perpendicular to the tube wall, and are magnet positive in the direction of attaching to the tube wall; the front positive magnet module (3-1) is arranged at the left end of the outer wall front pulley block module (4-1), and the rear positive magnet module (3-2) is arranged at the right end of the outer wall rear pulley block module (4-2); the outer wall front pulley block module (4-1) and the outer wall rear pulley block module (4-2) are arranged at the left end and the right end of the outer wall array probe coil module (5-1), four groups of pulleys are arranged, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube and can axially and freely slide during detection.
2. The profiled tubing suction type eddy current array probe as claimed in claim 1, wherein: the length of the outer wall rear pulley block module (4-2) is larger than that of the outer wall front pulley block module (4-1).
3. The profiled tubing suction type eddy current array probe as claimed in claim 1, wherein: the outer wall vortex array probe (7) is arranged on the outer wall scanning mechanical arm, and the outer wall scanning mechanical arm moves left and right to carry out scanning.
4. The profiled tubing suction type eddy current array probe as claimed in claim 1, wherein: the inner wall eddy current array probe (8) comprises a front negative magnet module (3-3), a rear negative magnet module (3-4), an inner wall front pulley block module (4-3), an inner wall rear pulley block module (4-4) and an inner wall array probe coil module (5-2); the front negative pole magnet module (3-3) and the rear negative pole magnet module (3-4) are opposite to the outer shape of the hexagonal tube, are V-shaped, are magnetized in the direction perpendicular to the tube wall, and are magnet negative poles in the attaching direction with the tube wall; the front negative pole magnet module (3-3) is arranged at the left end of the inner wall front pulley block module (4-3), and the rear negative pole magnet module (3-4) is arranged at the right end of the inner wall rear pulley block module (4-4); the inner wall front pulley block module (4-3) and the inner wall rear pulley block module (4-4) are arranged at the left end and the right end of the inner wall array probe coil module (5-2), four groups of pulleys are arranged, the pulleys protrude, and the pulleys are in plane contact with the hexagonal tube and can axially and freely slide during detection.
5. The profiled tubing suction type eddy current array probe as claimed in claim 4, wherein: the length of the inner wall front pulley block module (4-3) is larger than that of the inner wall rear pulley block module (4-4).
6. The profiled tubing suction type eddy current array probe as claimed in claim 4, wherein: the driving force of the inner wall vortex array probe (8) is provided by the outer wall vortex array probe (7) after the two groups of modules of the front positive magnet module (3-1) and the front negative magnet module (3-3), the rear positive magnet module (3-2) and the rear negative magnet module (3-4) are attracted mutually.
7. The profiled tubing suction type eddy current array probe as claimed in claim 4, wherein: the front positive pole magnet module (3-1), the front negative pole magnet module (3-3), the rear positive pole magnet module (3-2) and the rear negative pole magnet module (3-4) are equal in length, the outer wall front pulley block module (4-1) is equal in length to the inner wall rear pulley block module (4-4), and the outer wall rear pulley block module (4-2) is equal in length to the inner wall front pulley block module (4-3).
8. The profiled tubing suction type eddy current array probe as claimed in claim 7, wherein: when the outer wall eddy current array probe (7) and the inner wall eddy current array probe (8) are sucked, the positions of the outer wall array probe coil module (5-1) and the inner wall array probe coil module (5-2) are staggered.
9. The profiled tubing suction type eddy current array probe as claimed in claim 4, wherein: the contact surfaces of the outer wall front pulley block module (4-1), the outer wall rear pulley block module (4-2), the inner wall front pulley block module (4-3), the inner wall rear pulley block module (4-4), the outer wall array probe coil module (5-1), the inner wall array probe coil module (5-2) and the hexagonal tube (6) are all made of plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574988.7A CN109444259B (en) | 2018-12-21 | 2018-12-21 | Special-shaped pipe adsorption type eddy current array probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811574988.7A CN109444259B (en) | 2018-12-21 | 2018-12-21 | Special-shaped pipe adsorption type eddy current array probe |
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| CN109444259A CN109444259A (en) | 2019-03-08 |
| CN109444259B true CN109444259B (en) | 2024-02-20 |
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2018
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