CN109595447B - Lifting tool of vortex flow detection device for heat transfer tube of horizontal steam generator - Google Patents
Lifting tool of vortex flow detection device for heat transfer tube of horizontal steam generator Download PDFInfo
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- CN109595447B CN109595447B CN201811573675.XA CN201811573675A CN109595447B CN 109595447 B CN109595447 B CN 109595447B CN 201811573675 A CN201811573675 A CN 201811573675A CN 109595447 B CN109595447 B CN 109595447B
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- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/32—Undercarriages for supports with three or more telescoping legs
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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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- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nondestructive testing of a heat transfer tube of a steam generator of a nuclear power station, in particular relates to a lifting tool of a vortex flow detection device of a heat transfer tube of a horizontal steam generator, and aims to provide a lifting method of the vortex flow detection device of the heat transfer tube of the horizontal steam generator completely. The device is characterized by comprising an upright post, a front-end scaffold and a tail-end scaffold; the upright post is arranged on the outer side of the detection device body and used for fixing the detection device body; the front scaffold is provided with a plurality of front scaffolds, and the front scaffolds are sequentially arranged from top to bottom along the length direction of the upright post; the tail scaffold is arranged at the tail end of the upright post; the front end scaffold and the end scaffold are used together to provide support for the column and the detection device body.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing of a heat transfer tube of a steam generator of a nuclear power station, and particularly relates to a lifting tool of a vortex flow testing device of a heat transfer tube of a horizontal steam generator.
Background
The steam generator heat transfer tubes are the pressure boundary of the nuclear reactor coolant system and occupy more than 70% of the pressure boundary of the primary circuit. 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 always the weakest link of the pressure boundary of a loop. International nuclear power operation statistics indicate that more than about 50% of the on-service steam generators experience different degrees of breakage of the heat transfer tubes. The nuclear power stations at home and abroad perform pre-service and in-service inspection on the steam generator heat transfer pipe.
The steam generator of the VVER-1000M unit adopts a horizontal double-collecting pipe structure, and the heat transfer pipe adopts horizontal arrangement, which is called horizontal steam generator. The unique structural form determines that the detection device of the horizontal steam generator has great difference with the vertical steam generator, and the detection device of the horizontal steam generator needs to pass through a manhole with the diameter phi of 500mm before entering a collecting pipe of the steam generator with the inner diameter phi 834mm and the height of 5m for vortex detection.
At present, vortex detection equipment for horizontal steam generator heat transfer tubes is produced by SIEMENS company, INETEC company and HRID company; in China, the Chinese nuclear power operation technology Co., ltd produces the eddy current testing equipment of the horizontal steam generator heat transfer tube.
In the eddy current detection of the horizontal steam generator heat transfer tube, the installation of the detection device is a key part in the steam generator detection system, and not only relates to the efficiency of the detection work, but also influences the contents of the establishment of a detection plan, the arrangement of detection personnel and the like due to the irradiation dose level.
In the actual installation process, the structure and the working environment of the detection device bring some adverse factors to the hoisting process:
1. the detection device has longer supporting upright posts (more than 5000 mm), and needs larger installation space.
2. The whole device is heavier, the cables are more, the hanging point selection is particularly important, the cables are avoided, the hoisting process is considered to be convenient, and the unstable gravity center during hoisting is avoided.
3. The radius of the bottom supporting part of the device is larger, and the risk of collision with the scaffold exists during vertical hoisting.
4. The nuclear power station field environment is abominable, and the ground is uneven, and scaffold support is unstable, and the device focus skew is comparatively serious, and when whole device hoist and mount, needs several workman to be stable with the device bottom, hoist and mount again, and efficiency is lower.
Disclosure of Invention
The invention aims to provide a set of complete lifting method for the vortex detection device of the heat transfer tube of the horizontal steam generator.
The invention is realized in the following way:
a lifting tool of a vortex flow detection device of a horizontal steam generator heat transfer tube comprises a stand column, a front end scaffold and a tail end scaffold; the upright post is arranged on the outer side of the detection device body and used for fixing the detection device body; the front scaffold is provided with a plurality of front scaffolds, and the front scaffolds are sequentially arranged from top to bottom along the length direction of the upright post; the tail scaffold is arranged at the tail end of the upright post; the front end scaffold and the end scaffold are used together to provide support for the column and the detection device body.
The whole upright post is a framework and is divided into an upper section and a lower section; the upper upright posts are divided into a left upright post and a right upright post which are arranged in parallel and fixedly connected together through an upper cover plate; a plurality of hanging rings are arranged at the upper end of the upper cover plate and are used as hanging points of a hanging tool; the lower upright post is divided into a left upright post and a right upright post which are arranged in parallel and fixedly connected together through a lower cover plate; the lower end of the lower upright post is provided with a pin hole for connecting with a tail scaffold; the lower end of the lower cover plate is provided with a supporting part which is used for providing support at the bottom when the stand column and the detection device body are in a vertical state; the upper section and the lower section of the upright posts are fixedly connected into a whole by adopting screws.
The front-end scaffold comprises two groups of front-end scaffold support structures and a first beam; the two groups of front-end scaffold support structures are oppositely arranged, and the middle parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a cross beam.
The front-end scaffold support structure comprises a bottom support beam, a support column, a support beam, a first telescopic arm, a first beam, a telescopic mechanism, rocking bars, reinforcing ribs and universal wheels; universal wheels are arranged at the front end and the rear end of the lower end face of the bottom supporting beam, so that the movement of the front scaffold is realized; the lower end of the support column is fixed at the center of the upper end surface of the bottom support beam, and the upper part of the inner side end surface is fixed with a first cross beam; the reinforcing ribs are arranged on the front side and the rear side of the support column and used for reinforcing the bearing capacity of the support column; the telescopic mechanism is fixed at the upper end of the support column, the first telescopic arm is arranged above the telescopic mechanism, and the up-and-down movement of the first telescopic arm is realized by rotating a rocker on the telescopic mechanism; the supporting beam is fixed at the upper end of one inner side of the telescopic arm and is used for supporting the upright post.
The front end scaffolds described above are three in total.
The end scaffold comprises two groups of rear end scaffold support structures and a beam II; the two groups of front-end scaffold support structures are oppositely arranged, and the lower parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a beam II.
The end scaffold support structure comprises a bottom support beam, a support column, a telescopic mechanism, a rocker, a universal wheel, a telescopic arm II and a pin hole; universal wheels are arranged at the front end and the rear end of the bottom supporting beam to realize the movement of the tail scaffold; the front end and the rear end of the inner side end face of the bottom supporting beam are fixedly provided with a second cross beam; the lower end of the support column is fixed at the center of the upper end surface of the bottom support beam; the telescopic mechanism is fixed at the upper end of the support column, the second telescopic arm is arranged above the telescopic mechanism, and the up-and-down movement of the second telescopic arm is realized by rotating a rocker on the telescopic mechanism; the pin hole is arranged at the upper end of the second telescopic arm and is used for inserting a pin to realize movable connection with the upright post.
The height difference between the pin holes and the second cross beam is larger than the length of the supporting component, so that the supporting component and the tail scaffold do not interfere when the detection device body is lifted from the horizontal direction to the vertical direction.
The telescopic mechanism is realized by a screw rod sliding block mechanism.
The upright post, the front end scaffold and the tail end scaffold are all made of stainless steel materials.
The beneficial effects of the invention are as follows:
the invention can realize the sectional hoisting of the upright post, and the whole device is stable without manpower, is convenient to operate, saves manpower and operation space, and improves the working efficiency.
The invention has reasonable gravity center distribution during hoisting, solves the problem of uneven stress caused by unstable gravity center during hoisting, avoids damaging bearing parts, and has accurate positioning, thereby facilitating the device to be hoisted on an installation platform smoothly.
The scaffold is convenient to move during installation, the supporting heights of the left and right cross beams can be independently adjusted, the device can adapt to complex working environments of a nuclear power station, and collision in the hoisting process can be avoided.
Drawings
FIG. 1 is a schematic installation diagram of a lifting tool of a heat transfer tube vortex detection device of a horizontal steam generator;
fig. 2 is a schematic structural view of the front-end scaffold of the present invention;
fig. 3 is a schematic structural view of the end scaffold of the present invention.
Wherein: 1. the device comprises a stand column, a supporting platform, a detection device body, a supporting component, a front end scaffold, a screw, a tail end scaffold, a supporting beam, a telescopic arm I, a beam I, a telescopic mechanism I, a rocker, a reinforcing rib, a universal wheel, a telescopic arm II, a pin hole and a beam II.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, a lifting tool of a vortex flow detection device for a heat transfer tube of a horizontal steam generator comprises a vertical column 1, a front scaffold 5 and a tail scaffold 7. The stand 1 is arranged outside the detection device body 3 and is used for fixing the detection device body 3. The front scaffold 5 is a plurality of, and is arranged from top to bottom along the length direction of the upright post 1. The end scaffolds 7 are arranged at the ends of the upright posts. The front end scaffolding 5 and the end scaffolding 7 together serve to provide support for the upright 1 and the detection device body 3.
As shown in fig. 1, the whole upright 1 is a frame structure and is divided into an upper section and a lower section. The upper upright post is divided into a left upright post and a right upright post which are arranged in parallel and are fixedly connected together through an upper cover plate. And a plurality of hanging rings are arranged at the upper end of the upper cover plate and serve as hanging points of hanging tools. The lower upright post is divided into a left upright post and a right upright post which are arranged in parallel and fixedly connected together through a lower cover plate. A pin hole is provided at the lower end of the lower upright for connecting the end scaffold 7. A support member 4 is provided at the lower end of the lower cover plate for providing support at the bottom when the column 1 and the detecting device body 3 are in a vertical state. The upper section and the lower section of the upright posts are fixedly connected into a whole by adopting screws 6.
As shown in fig. 2, the front end scaffold 5 comprises two sets of front end scaffold support structures and a first beam 10. The two groups of front-end scaffold support structures are oppositely arranged, and the middle parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a first beam 10. The front-end scaffold support structure comprises a bottom support beam, a support column, a support cross beam 8, a first telescopic arm 9, a first cross beam 10, a telescopic mechanism 11, a rocker 12, a reinforcing rib 13 and universal wheels 14. Universal wheels 14 are arranged at the front end and the rear end of the lower end face of the bottom supporting beam, so that the front-end scaffold 5 can move. The lower end of the support column is fixed at the center of the upper end face of the bottom support beam, and the first cross beam 10 is fixed at the upper part of the inner end face. The reinforcing ribs 13 are arranged on the front side and the rear side of the support column and used for reinforcing the bearing capacity of the support column. The telescopic mechanism 11 is fixed at the upper end of the support column, the first telescopic arm 9 is arranged above the telescopic mechanism 11, and the up-and-down movement of the first telescopic arm 9 is realized by rotating the rocker 12 on the telescopic mechanism 11. The supporting cross beam 8 is fixed at the upper end of the inner side of the telescopic arm 9 and is used for supporting the upright post 1.
The front scaffold 5 has three kinds.
As shown in fig. 3, the end scaffold 7 comprises two sets of rear end scaffold support structures and a second beam 17. The two groups of front-end scaffold support structures are oppositely arranged, and the lower parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a second beam 17. The end scaffold support structure comprises a bottom support beam, a support column, a telescopic mechanism 11, a rocker 12, universal wheels 14, a telescopic arm II 15 and pin holes 16. Universal wheels 14 are arranged at the front end and the rear end of the bottom supporting beam to realize the movement of the end scaffold 7. The front and rear ends of the inner side end face of the bottom supporting beam are fixed with a second cross beam 17. The lower end of the support column is fixed at the center of the upper end surface of the bottom support beam. The telescopic mechanism 11 is fixed at the upper end of the support column, the second telescopic arm 15 is arranged above the telescopic mechanism 11, and the up-and-down movement of the second telescopic arm 15 is realized by rotating the rocker 12 on the telescopic mechanism 11. The pin hole 16 is arranged at the upper end of the telescopic arm II 15 and is used for inserting a pin to realize movable connection with the upright post 1.
The height difference between the pin holes 16 and the second cross beam 17 is larger than the length of the supporting component 4, so that the supporting component 4 and the tail scaffold 7 do not interfere when the detection device body 3 is lifted from the horizontal direction to the vertical direction.
In this embodiment, the telescopic mechanism 11 is implemented by a screw slider mechanism. The upright post 1, the front end scaffold 5 and the tail end scaffold 7 are all made of stainless steel materials.
The working principle of the invention is as follows:
1. the front end scaffolds 5 and the end scaffolds 7 are arranged side by side as shown in fig. 1, and the scaffolds 7 are arranged at the ends. The left and right upright posts at the upper and lower ends of the upright post 1 are hoisted on the scaffold beam, the tail ends of the upright posts are connected with tail end scaffold pin holes 16 through pins, and the heights of the two side beams are adjusted by using scaffold rockers 12 until the upright post 1 is horizontally placed, and the left and right heights are consistent. After the column 1 is spliced and assembled, the column is fastened by a screw 6. And assembling the lower cover plate with the lower upright post, and locking by a screw. The support member 4 is assembled with the lower cover plate.
2. And lifting the detection device body 3, and assembling the detection device roller and the gear with the upright roller path and the rack respectively. The upper cover plate is then assembled with the upper upright and fastened with screws. And lifting the supporting platform 2, and assembling with the upright post to complete the whole device assembly.
3. And (3) lifting the lifting ring, taking out the pin when the device is in a vertical state, lifting the pin into a collecting pipe of the steam generator, and fixing the supporting platform 2 with the steam generator platform to finish the whole lifting process.
4. When the device is disassembled, the scaffolds are arranged side by side according to the figure 1, and the rocker is adjusted to enable the cross beam and the pin holes to be positioned on the same horizontal line. The detecting device body 3 is lifted out of the collecting pipe. The end of the column 1 is then connected to the end scaffold pin hole 16 and the device is slowly placed until it is placed horizontally on the scaffold and finally the device is removed.
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. A lifting tool of a vortex flow detection device for a heat transfer tube of a horizontal steam generator is characterized in that: the device comprises an upright post (1), a front-end scaffold (5) and a tail-end scaffold (7); the upright post (1) is arranged at the outer side of the detection device body (3) and is used for fixing the detection device body (3); the front-end scaffolds (5) are arranged in a plurality from top to bottom along the length direction of the upright post (1); the tail scaffold (7) is arranged at the tail end of the upright post; the front end scaffold (5) and the tail end scaffold (7) are used for supporting the upright post (1) and the detection device body (3);
the whole upright post (1) is a framework and is divided into an upper section and a lower section; the upper upright posts are divided into a left upright post and a right upright post which are arranged in parallel and fixedly connected together through an upper cover plate; a plurality of hanging rings are arranged at the upper end of the upper cover plate and are used as hanging points of a hanging tool; the lower upright post is divided into a left upright post and a right upright post which are arranged in parallel and fixedly connected together through a lower cover plate; the lower end of the lower upright post is provided with a pin hole for connecting with a tail scaffold (7); the lower end of the lower cover plate is provided with a supporting part (4) for supporting the bottom when the upright post (1) and the detection device body (3) are in a vertical state; the upper section and the lower section of the upright posts are fixedly connected into a whole by bolts (6).
2. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 1, wherein: the front-end scaffold (5) comprises two groups of front-end scaffold supporting structures and a first beam (10); the two groups of front-end scaffold support structures are oppositely arranged, and the middle parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a first cross beam (10).
3. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 2, wherein: the front-end scaffold support structure comprises a bottom support beam, a support column, a support cross beam (8), a first telescopic arm (9), a first cross beam (10), a telescopic mechanism (11), a rocker (12), a reinforcing rib (13) and universal wheels (14); universal wheels (14) are arranged at the front end and the rear end of the lower end face of the bottom supporting beam to realize the movement of the front scaffold (5); the lower end of the support column is fixed at the center of the upper end surface of the bottom support beam, and the upper part of the inner side end surface is fixed with a first cross beam (10); reinforcing ribs (13) are arranged on the front side and the rear side of the support column and used for reinforcing the bearing capacity of the support column; the telescopic mechanism (11) is fixed at the upper end of the support column, the first telescopic arm (9) is arranged above the telescopic mechanism (11), and the up-and-down movement of the first telescopic arm (9) is realized by rotating the rocker (12) on the telescopic mechanism (11); the supporting cross beam (8) is fixed at the upper end of the inner side of the first telescopic arm (9) and is used for supporting the upright post (1).
4. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 2, wherein: the front scaffold (5) is three in total.
5. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 1, wherein: the tail end scaffold (7) comprises two groups of rear end scaffold supporting structures and a beam II (17); the two groups of front-end scaffold support structures are oppositely arranged, and the lower parts of the two groups of front-end scaffold support structures are fixedly connected into a whole through a beam II (17).
6. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 5, wherein: the terminal scaffold support structure comprises a bottom support beam, a support column, a telescopic mechanism (11), a rocker (12), universal wheels (14), a telescopic arm II (15) and pin holes (16); universal wheels (14) are arranged at the front end and the rear end of the bottom supporting beam to realize the movement of the tail scaffold (7); the front end and the rear end of the inner side end face of the bottom supporting beam are fixed with a cross beam II (17); the lower end of the support column is fixed at the center of the upper end surface of the bottom support beam; the telescopic mechanism (11) is fixed at the upper end of the support column, the telescopic arm II (15) is arranged above the telescopic mechanism (11), and the up-and-down movement of the telescopic arm II (15) is realized by rotating the rocker (12) on the telescopic mechanism (11); the pin hole (16) is arranged at the upper end of the telescopic arm II (15) and is used for inserting a pin to realize movable connection with the upright post (1).
7. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 6, wherein: the height difference between the pin holes (16) and the second cross beam (17) is larger than the length of the supporting component (4), so that the supporting component (4) and the tail scaffold (7) do not interfere when the detection device body (3) is lifted from the horizontal direction to the vertical direction.
8. The lifting tool of the horizontal steam generator heat transfer tube vortex detection apparatus according to claim 3 or 6, wherein: the telescopic mechanism (11) is realized by a screw rod sliding block mechanism.
9. The lifting tool of the vortex flow detection device for the heat transfer tube of the horizontal steam generator according to claim 1, wherein: the upright post (1), the front end scaffold (5) and the tail end scaffold (7) are all made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573675.XA CN109595447B (en) | 2018-12-21 | 2018-12-21 | Lifting tool of vortex flow detection device for heat transfer tube of horizontal steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573675.XA CN109595447B (en) | 2018-12-21 | 2018-12-21 | Lifting tool of vortex flow detection device for heat transfer tube of horizontal steam generator |
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| Publication Number | Publication Date |
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| CN109595447A CN109595447A (en) | 2019-04-09 |
| CN109595447B true CN109595447B (en) | 2024-03-22 |
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| CN201811573675.XA Active CN109595447B (en) | 2018-12-21 | 2018-12-21 | Lifting tool of vortex flow detection device for heat transfer tube of horizontal steam generator |
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