CN109975425B - Delivery ultrasonic inspection device for reactor pressure vessel connecting pipe - Google Patents
Delivery ultrasonic inspection device for reactor pressure vessel connecting pipe Download PDFInfo
- Publication number
- CN109975425B CN109975425B CN201711449666.5A CN201711449666A CN109975425B CN 109975425 B CN109975425 B CN 109975425B CN 201711449666 A CN201711449666 A CN 201711449666A CN 109975425 B CN109975425 B CN 109975425B
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- China
- Prior art keywords
- connecting pipe
- stop lever
- motion part
- sucker
- linear motion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007689 inspection Methods 0.000 title claims abstract description 31
- 239000007787 solid Substances 0.000 claims description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 241000252254 Catostomidae Species 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/048—Marking the faulty objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2636—Surfaces cylindrical from inside
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of ultrasonic nondestructive testing, and particularly relates to a reactor pressure vessel connecting pipe delivery ultrasonic inspection device. The ultrasonic inspection device comprises a sucker device, a revolving body, a circular motion part, a tray part, a linear motion part and a revolving support part, wherein the sucker device is connected with the revolving body through screws, the circular motion part and the linear motion part are respectively connected between the revolving body and the revolving support part, the position of the circular motion part is arranged on one side close to the revolving body, and the tray part is arranged on the linear motion part. The device can meet the requirement of the scanning range without influencing the scanning range of the tray component; the equipment fixing reliability is high.
Description
Technical Field
The invention belongs to the technical field of ultrasonic nondestructive testing, and particularly relates to a reactor pressure vessel connecting pipe delivery ultrasonic inspection device.
Background
The pressure vessel is connected with the main pipeline through the transition of the safety end, the radioactive cooling medium flows through the pressure vessel, if the area leaks, serious safety accidents occur, and therefore, after the pressure vessel is manufactured by an additional manufacturing plant, the safety end connection of the pressure vessel needs to be checked. Before the nuclear reactor pressure vessel is transported to a nuclear power station, the connecting pipe is connected with the pressure vessel, the safe end part is connected with the connecting pipe, the main pipeline is not connected with the safe end, before leaving the factory, the manufacturing factory can perform a compression test on the pressure vessel, the joint of the main pipeline of the safe end of the connecting pipe is sealed by a spherical sealing head, the scanning range of the welding line of the safe end of the connecting pipe needs to move from a probe tray to the welding position of the spherical sealing head and the safe end, and the available space in the inspection range is smaller, so that the welding line of the safe end of the connecting pipe needs to be inspected on the inner side of the connecting pipe before leaving the factory of the nuclear reactor pressure vessel, and the ultrasonic inspection is an important common means for implementing the ultrasonic inspection on the areas by adopting automatic equipment.
At present, large-scale inspection equipment is mainly adopted for inspecting different parts of a pressure container by carrying various inspection tools, so that the pressure container is high in manufacturing cost, large in occupied area, more in operators and high in equipment operation and installation risk. Aiming at the inspection requirement of a nuclear power equipment manufacturer on a butt joint pipe, a device is designed to realize the factory ultrasonic inspection of the pressure container connecting pipe, and the device has the advantages of strong maneuverability, low cost, small occupied area and quick and convenient installation operation.
Disclosure of Invention
The invention provides a factory ultrasonic inspection device for a safety end of a nuclear reactor pressure vessel connecting pipe aiming at the defects.
The technical scheme of the invention is as follows:
The ultrasonic inspection device comprises a sucker device, a revolving body, a circular motion part, a tray part, a linear motion part and a revolving support part, wherein the sucker device is connected with the revolving body through screws, the circular motion part and the linear motion part are respectively connected between the revolving body and the revolving support part, the position of the circular motion part is arranged at one side close to the revolving body, and the tray part is arranged on the linear motion part;
the rotary supporting component is fixed on the inner side of the connecting pipe, and the sucker component is fixed on the pressure vessel cylinder body at the connecting pipe opening through the sucker; the circular motion part drives the linear motion part to integrally rotate, and the tray part realizes linear motion on the linear motion part, so that the tray part can be scanned from the safety end of the connecting pipe to the vicinity of the connecting pipe opening all the time.
The utility model provides a reactor pressure vessel takeover ultrasonic inspection device that dispatches from factory, sucking disc device includes frame, pin, horizontal pole and sucking disc, through screw connection between frame and the solid of revolution, installs the pin respectively at the upper and lower both ends of frame, and the pin is arranged perpendicularly with the frame axis, and the horizontal pole is perpendicular arrangement with the pin, and horizontal pole one end passes through screw connection with the pin, and the other end passes through screw installation sucking disc.
The utility model provides a reactor pressure vessel takeover ultrasonic inspection device that leaves factory, be provided with the multiunit screw hole that can be connected with the horizontal pole on the pin, the horizontal pole can be realized connecting in different positions on the pin.
The utility model provides a reactor pressure vessel takeover ultrasonic inspection device that leaves factory, be provided with the multiunit screw hole that can be connected with the pin on the horizontal pole, adjust the distance between sucking disc to the pin, realize inspection device at takeover axial ascending regulation.
The invention has the beneficial effects that:
1) Because the inspection range of the inner side of the connecting pipe is large, the scanning range of the connecting pipe can not be completely covered by the tray component due to the fact that the tray component moves to the connecting pipe port from the vicinity of the safety end of the connecting pipe along the axis of the connecting pipe, and the scanning range of the tray component is not affected under the condition that the equipment is reliably fixed due to the fact that the external sucker supporting and fixing mode is adopted, and the requirement of the scanning range is met;
2) And the upper and lower groups of suckers are symmetrically arranged. Each group of suckers can be composed of one or more suckers, so that the reliability of equipment fixing is ensured. The distance between the sucker and the vertical long rod can be adjusted by the cross rod on the sucker structure, so that the inspection requirements of connecting pipes with different lengths are met;
3) The inspection device is assembled in a modular design. The nuclear power equipment manufacturer can quickly assemble the inspection device according to the inspection requirement. A group of three-leg supports in the connecting pipe are combined with the adsorption stationary phase of the outer sucker, so that the reliability of fixing the inspection device is improved. The stop lever in the sucker component also plays a role in axially positioning the inspection device.
Drawings
FIG. 1 is a schematic diagram of a construction of a factory ultrasonic inspection device for a nuclear reactor pressure vessel adapter according to the present invention;
FIG. 2 is a schematic view of a suction cup device according to the present invention;
Fig. 3 is a view showing the installation effect of the ultrasonic inspection device for the adapter tube of the nuclear reactor pressure vessel according to the present invention.
In the figure: 1. connecting pipe; 2. a frame; 3. a stop lever; 4. a cross bar; 5. a suction cup; 6. a revolving body; 7. a circular motion member; 8. a tray member; 9. a linear motion member; 10. a rotary support member; 11. a pressure vessel cylinder; 12. suction cup means.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The ultrasonic inspection device for the connection pipe of the nuclear reactor pressure vessel, which is seen in the figure 1, comprises a sucker device 12, a revolving body 6, a circular motion part 7, a tray part 8, a linear motion part 9 and a revolving support part 10, wherein the sucker device 12 is connected with the revolving body 6 through screw connection, the circular motion part 7 and the linear motion part 9 are respectively connected between the revolving body 6 and the revolving support part 10, the position of the circular motion part 7 is arranged at one side close to the revolving body 6, and the tray part 8 is arranged on the linear motion part 9;
The rotary supporting component 10 is fixed on the inner side of the connecting pipe 1, and the sucker component 12 is fixed on the pressure vessel cylinder 11 at the connecting pipe opening through the sucker 5; the circular motion part 7 drives the linear motion part 9 to integrally rotate, and the tray part 8 realizes linear motion on the linear motion part 9, so that the tray part 8 can scan all the way from the safety end of the connecting pipe 1 to the vicinity of the connecting pipe opening.
The sucking disc device 12 comprises a frame 2, a stop lever 3, a cross rod 4 and a sucking disc 5, wherein the frame 2 is connected with a revolving body 6 through screws, the stop lever 3 is respectively installed at the upper end and the lower end of the frame 2, the stop lever 3 is vertically arranged with the axis of the frame 2, the cross rod 4 is vertically arranged with the stop lever 3, one end of the cross rod 4 is connected with the stop lever 3 through screws, and the sucking disc 5 is installed at the other end of the cross rod 4 through screws.
The stop lever 3 is provided with a plurality of groups of threaded holes which can be connected with the cross rod 4, and the cross rod 4 can be connected at different positions on the stop lever 3.
The cross rod 4 is provided with a plurality of groups of threaded holes which can be connected with the stop lever 3, and the distance between the suction disc 5 and the stop lever 3 is adjusted, so that the inspection device can be adjusted in the axis direction of the connecting pipe.
Claims (1)
1. The utility model provides a reactor pressure vessel takeover ultrasonic inspection device that leaves factory, includes sucking disc device (12), solid of revolution (6), circular motion part (7), tray part (8), rectilinear motion part (9) and gyration supporting part (10) are constituteed, its characterized in that: the sucker device (12) is connected with the revolving body (6) through screws, a circular motion part (7) and a linear motion part (9) are respectively connected between the revolving body (6) and the revolving support part (10), the position of the circular motion part (7) is arranged at one side close to the revolving body (6), and a tray part (8) is arranged on the linear motion part (9); the rotary supporting component (10) is fixed on the inner side of the connecting pipe (1), and the sucker device (12) is fixed on the pressure vessel cylinder (11) at the connecting pipe opening through the sucker (5); the circular motion part (7) drives the linear motion part (9) to integrally rotate, and the tray part (8) realizes linear motion on the linear motion part (9), so that the tray part (8) can scan all the way from the safety end of the connecting pipe (1) to the vicinity of the connecting pipe opening;
The sucker device (12) comprises a frame (2), a stop lever (3), a cross rod (4) and a sucker (5), wherein the frame (2) is connected with a revolving body (6) through screws, the stop lever (3) is respectively arranged at the upper end and the lower end of the frame (2), the stop lever (3) is perpendicular to the axis of the frame (2), the cross rod (4) is perpendicular to the stop lever (3), one end of the cross rod (4) is connected with the stop lever (3) through screws, and the sucker (5) is arranged at the other end of the cross rod (4) through screws;
The stop lever (3) is provided with a plurality of groups of threaded holes which can be connected with the cross rod (4), and the cross rod (4) can be connected at different positions on the stop lever (3);
The transverse rod (4) is provided with a plurality of groups of threaded holes which can be connected with the stop lever (3), and the distance between the sucker (5) and the stop lever (3) is adjusted to realize the adjustment of the inspection device in the axis direction of the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449666.5A CN109975425B (en) | 2017-12-27 | 2017-12-27 | Delivery ultrasonic inspection device for reactor pressure vessel connecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449666.5A CN109975425B (en) | 2017-12-27 | 2017-12-27 | Delivery ultrasonic inspection device for reactor pressure vessel connecting pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109975425A CN109975425A (en) | 2019-07-05 |
| CN109975425B true CN109975425B (en) | 2024-06-11 |
Family
ID=67072539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711449666.5A Active CN109975425B (en) | 2017-12-27 | 2017-12-27 | Delivery ultrasonic inspection device for reactor pressure vessel connecting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109975425B (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06222046A (en) * | 1993-01-21 | 1994-08-12 | Nippon Koei Co Ltd | Nondestructive inspection sensor and sucker for wall face walking robot |
| JPH07159382A (en) * | 1993-12-06 | 1995-06-23 | Hitachi Ltd | Device for inspecting inside of pipe |
| EP0667527A1 (en) * | 1994-02-03 | 1995-08-16 | Compagnie Generale Des Matieres Nucleaires | Device for ultrasonic non-destructive testing of a branch of a circular pipe |
| JP2000321255A (en) * | 1999-05-11 | 2000-11-24 | Ishikawajima Harima Heavy Ind Co Ltd | Welded part inspection device |
| CN201548528U (en) * | 2009-11-10 | 2010-08-11 | 靳立稳 | Special ultrasonic wave probing pipe for bridge |
| CN101916598A (en) * | 2010-08-19 | 2010-12-15 | 中广核检测技术有限公司 | Multifunctional inspection equipment of nuclear reactor pressure vessel nozzle |
| CN103871515A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Ultrasonic inspection tool for main pipeline of reactor pressure vessel |
| CN104977298A (en) * | 2015-06-13 | 2015-10-14 | 李洋 | Rotary type optical-acoustic combined imaging probe and conduit |
| CN205065438U (en) * | 2015-10-21 | 2016-03-02 | 银都餐饮设备股份有限公司 | Food heat preservation lamp |
| CN205250972U (en) * | 2016-01-04 | 2016-05-25 | 黎静霖 | Can correct student's seat of position of sitting |
| CN105810267A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Ultrasonic detection apparatus for intersecting surface of adapter tubes of nuclear reactor pressure vessel |
| CN105806941A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Vacuum sucker-type small-diameter tube inner wall water immersion ultrasonic inspection device |
| CN205506768U (en) * | 2016-02-26 | 2016-08-24 | 国核电站运行服务技术有限公司 | Pipeline device of crawling |
| CN106290466A (en) * | 2016-08-01 | 2017-01-04 | 国网安徽省电力公司电力科学研究院 | Between bunched cables, fire laterally spreads test device |
| KR101714451B1 (en) * | 2015-12-18 | 2017-03-09 | 김병훈 | Holding device of interior inspection equipment for nuclear steam generator tubes |
| CN106935289A (en) * | 2015-12-29 | 2017-07-07 | 核动力运行研究所 | A kind of reactor pressure vessel peace note pipe is automatic to check positioning drive unit |
| CN107195344A (en) * | 2017-06-07 | 2017-09-22 | 四川行之智汇知识产权运营有限公司 | Device for nuclear power station specialized fluids pipeline tapping |
| CN207882220U (en) * | 2017-12-27 | 2018-09-18 | 核动力运行研究所 | A kind of reactor pressure vessel take over manufacture ultrasonic inspection apparatus |
-
2017
- 2017-12-27 CN CN201711449666.5A patent/CN109975425B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06222046A (en) * | 1993-01-21 | 1994-08-12 | Nippon Koei Co Ltd | Nondestructive inspection sensor and sucker for wall face walking robot |
| JPH07159382A (en) * | 1993-12-06 | 1995-06-23 | Hitachi Ltd | Device for inspecting inside of pipe |
| EP0667527A1 (en) * | 1994-02-03 | 1995-08-16 | Compagnie Generale Des Matieres Nucleaires | Device for ultrasonic non-destructive testing of a branch of a circular pipe |
| JP2000321255A (en) * | 1999-05-11 | 2000-11-24 | Ishikawajima Harima Heavy Ind Co Ltd | Welded part inspection device |
| CN201548528U (en) * | 2009-11-10 | 2010-08-11 | 靳立稳 | Special ultrasonic wave probing pipe for bridge |
| CN101916598A (en) * | 2010-08-19 | 2010-12-15 | 中广核检测技术有限公司 | Multifunctional inspection equipment of nuclear reactor pressure vessel nozzle |
| CN103871515A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Ultrasonic inspection tool for main pipeline of reactor pressure vessel |
| CN105810267A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Ultrasonic detection apparatus for intersecting surface of adapter tubes of nuclear reactor pressure vessel |
| CN105806941A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Vacuum sucker-type small-diameter tube inner wall water immersion ultrasonic inspection device |
| CN104977298A (en) * | 2015-06-13 | 2015-10-14 | 李洋 | Rotary type optical-acoustic combined imaging probe and conduit |
| CN205065438U (en) * | 2015-10-21 | 2016-03-02 | 银都餐饮设备股份有限公司 | Food heat preservation lamp |
| KR101714451B1 (en) * | 2015-12-18 | 2017-03-09 | 김병훈 | Holding device of interior inspection equipment for nuclear steam generator tubes |
| CN106935289A (en) * | 2015-12-29 | 2017-07-07 | 核动力运行研究所 | A kind of reactor pressure vessel peace note pipe is automatic to check positioning drive unit |
| CN205250972U (en) * | 2016-01-04 | 2016-05-25 | 黎静霖 | Can correct student's seat of position of sitting |
| CN205506768U (en) * | 2016-02-26 | 2016-08-24 | 国核电站运行服务技术有限公司 | Pipeline device of crawling |
| CN106290466A (en) * | 2016-08-01 | 2017-01-04 | 国网安徽省电力公司电力科学研究院 | Between bunched cables, fire laterally spreads test device |
| CN107195344A (en) * | 2017-06-07 | 2017-09-22 | 四川行之智汇知识产权运营有限公司 | Device for nuclear power station specialized fluids pipeline tapping |
| CN207882220U (en) * | 2017-12-27 | 2018-09-18 | 核动力运行研究所 | A kind of reactor pressure vessel take over manufacture ultrasonic inspection apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 反应堆压力容器接管安全端超声检查装置设计研究;王俊涛等;机械工程师;20150110(第1期);第71-73页 * |
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| Publication number | Publication date |
|---|---|
| CN109975425A (en) | 2019-07-05 |
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