CN112086213B - An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit - Google Patents
An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit Download PDFInfo
- Publication number
- CN112086213B CN112086213B CN201910512196.5A CN201910512196A CN112086213B CN 112086213 B CN112086213 B CN 112086213B CN 201910512196 A CN201910512196 A CN 201910512196A CN 112086213 B CN112086213 B CN 112086213B
- Authority
- CN
- China
- Prior art keywords
- supporting seat
- fixed sleeve
- end cover
- top cover
- centering
- 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.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
-
- 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)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
本发明属于核电站检修领域，具体涉及一种用于压水堆机组压力容器顶盖吊装的光学对中装置。本装置包括发射装置、接收装置和标定装置。接收装置包括靶标和导向柱，靶标安装在导向柱上。所述的支撑座中空圆盘，中心部分带有螺纹；发射器安装在固定套内，固定套与支承座通过中心螺纹固定连接，并通过锁紧螺母紧固固定套；固定套上穿有6个调节螺钉，调节发射器与支承座的同轴度。本装置节省大量对中耗费时间，减少人员剂量，并增加对中作业的可视性、准确性，以保证设备的安全性。
The present invention belongs to the field of nuclear power plant maintenance, and specifically relates to an optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit. The device includes a transmitting device, a receiving device and a calibration device. The receiving device includes a target and a guide column, and the target is installed on the guide column. The support seat is a hollow disk with a thread in the center; the transmitter is installed in a fixed sleeve, and the fixed sleeve and the support seat are fixedly connected by a central thread, and the fixed sleeve is fastened by a locking nut; 6 adjustment screws are passed through the fixed sleeve to adjust the coaxiality of the transmitter and the support seat. The device saves a lot of time spent on centering, reduces personnel dose, and increases the visibility and accuracy of the centering operation to ensure the safety of the equipment.
Description
Technical Field
The invention belongs to the field of nuclear power station overhaul, and particularly relates to an optical centering device for hoisting a top cover of a pressure vessel of a pressurized water reactor unit.
Background
In a sealed metal shell. During the refueling overhaul of the pressurized water reactor unit, the reactor roof is lifted from the reactor core to the roof storage room so as to perform nuclear fuel replacement. And after the fuel is replaced, lifting the top cover to the reactor core for reloading.
At present, when the top cover is assembled back, the pressurized water reactor unit is visually centered through the through hole of the top cover flange by taking a guide post arranged on the bottom hole of the pressure vessel as a centering reference. Due to the limitation of the observation angle, the centering mode needs to be carried out by arranging personnel at the bottom of the refueling water tank for auxiliary centering, and the reactor core is exposed at the moment and has extremely high radioactivity. Meanwhile, due to the limitation of a visual mode, centering is needed under the top-down hoisting, the operation is long, and the dosage of the extremely high radiation environment is accepted and the industrial safety risk is high.
Taking an M310 heap type as an example, a hoisting main command sends a command to a ring hoisting driver through an interphone, and a top cover is hoisted to the upper part of a reactor core from a top cover storage room. When the top cover is aligned with the guide post, the gap between the guide post and the top cover through hole is observed for many times, and the ring hanging position is adjusted. Because the position centering accuracy of the three guide posts is required to be ensured, the hoisting command is required to be observed repeatedly to determine the position of the ring crane, and the centering time is long. Meanwhile, as the top cover flange is thicker, people can not visually enter the top cover through hole through the guide post when standing above the water tank, and the workers are required to be arranged at the bottom of the water tank to observe, so that the workers are exposed to the exposed high-radioactivity environment of the reactor core, and the high-radioactivity reactor core has great safety risk. Meanwhile, according to experience feedback, other power plants have similar guide column scraping events at present, and certain influences are caused on equipment safety and major repair lines.
Disclosure of Invention
1. The purpose is as follows:
The optical structure auxiliary centering device for the hoisting operation of the top cover of the pressurized water reactor unit of the nuclear power plant is developed, the operation difficulty of the hoisting operation of the top cover of the pressurized water reactor unit of the pressurized water reactor is reduced, a large amount of centering time is saved, the personnel dosage is reduced, and the visibility and the accuracy of the centering operation are improved so as to ensure the safety of equipment. Has important significance on the safety and economic benefit of the nuclear power plant.
2. The technical scheme is as follows:
The optical centering device for hoisting the top cover of the pressure vessel of the pressurized water reactor unit comprises a transmitting device, a receiving device and a calibrating device, wherein the transmitting device comprises a lifting lug, a connector, a supporting seat, a bottom end cover, a transmitter and a flange, the lifting lug is arranged at the upper end of a supporting head in a threaded connection manner, the supporting head is connected to the supporting seat through a bolt, the receiving device comprises a target and a guide post, and the target is arranged on the guide post. The supporting seat hollow disc is provided with threads at the central part, the emitter is arranged in the fixed sleeve, the fixed sleeve is fixedly connected with the supporting seat through the central threads and fastened by the locking nut, and 6 adjusting screws penetrate through the fixed sleeve to adjust the coaxiality of the emitter and the supporting seat.
The calibration device comprises a calibration cylinder body, a guide plate, a cross mark and a bottom plate, wherein the calibration cylinder body is of an integrated structure and is a hollow cylinder as a whole, the guide plate is a disc, and a center hole is formed in the center of the circle.
The center of the bottom plate is a cross mark.
The connecting line of the cross mark and the central hole of the guide plate is coaxial with the central line of the cylinder body of the calibration cylinder.
The bottom end cover is connected with the supporting seat through a long bolt, the end cover wall of the bottom end cover is tightly contacted with the inner wall of the center of the flange, and the center of the bottom end cover is provided with a through hole with the same diameter as the diameter of the emitter.
The flange is uniformly provided with annular through holes, and the diameter of the supporting seat is larger than the inner diameter of the flange through holes.
The emitter is cylindrical, penetrates through the middle of the connector, penetrates through the fixing sleeve, and the bottom of the emitter is located above the end cover.
The guide posts are arranged on screw holes distributed in the annular shape of the pressure vessel at a certain angle.
3. The effect is as follows:
The invention is successfully applied to the top cover reloading operation of the Qinshan nuclear power Fangjia mountain No. 1 and No. 2 unit. Through field experience feedback, the device has good use effect, effectively shortens the centering time of top cover reinstallation, generates economic benefit and improves the safety of the unit. The device not only ensures the accuracy and safety of the top cover reloading operation centering, but also reduces the personnel operation time under the high-radioactivity environment.
The invention has the following advantages:
1. pressure for pressurized water reactor nuclear power station the top cover of the container is recycled.
2. And due to the optical structural design, visual centering is realized, and centering difficulty is reduced.
3. The light-weight structural design is simple and easy to operate.
4. And the target design, optical centering and hoisting centering precision are high.
5. The centering precision calibration device is designed to ensure the precision of the optical emitter.
6. Visual blind areas are eliminated, pond centering observers are eliminated, and hoisting operation safety is improved.
Drawings
FIG. 1 is a schematic view of an optical centering device
FIG. 2 is a schematic diagram of a marking cylinder in an optical pair
FIG. 3 is a top view of the mounting location of the optical centering device
In the figure, 1, lifting lug, 2, connector, 3, bolt, 4, supporting seat, 5, bottom end cover, 6, emitter, 7, fixing sleeve, 8, adjusting screw, 9, locking nut, 10, top cover flange, 11, target, 12, guide post, 13, calibration cylinder body, 14, guide plate, 15, cross mark, 16 and bottom plate
Detailed Description
The device mainly comprises a transmitting device, a receiving device and a calibrating device.
As shown in fig. 1, the lifting lug 1 is mounted on the connecting head 2 through a threaded connection, and the connecting head 2 is connected on the supporting seat 4 through a bolt. The fixing sleeve 7 is connected with the supporting seat 4 through threads and is fastened through a locking nut 9. The emitter 6 is arranged in the fixed sleeve 7, and the coaxiality of the emitter and the supporting seat 4 can be adjusted by adjusting 6 adjusting screws 8 on the fixed sleeve 7. The bottom end cap 5 is connected with the supporting seat 4 through threads.
As shown in fig. 2, the target 11 is mounted on a guide post 12.
As shown in fig. 3, the calibration cylinder body 13 is integrally processed, and the cylindrical surface of the upper part of the cylinder body is matched with the cylindrical surface of the supporting seat 4 to play a role in positioning. The connecting line of the central cross mark 15 of the bottom plate 16 and the central hole of the guide plate 14 is coaxial with the central line of the calibration cylinder body 13 so as to ensure the centering accuracy.
The device is matched with the through hole of the top cover flange through the cylindrical surface of the supporting seat 4 so as to ensure the centering precision of the center of the through hole and the emitter 6.
The specific operation steps are as follows:
The optical centering device is calibrated by installing the optical centering device on a calibration cylinder of the optical centering device, adjusting the laser emitted by the emitter 6 to pass through the guide plate 14 through the adjusting screw 8, and performing fine adjustment according to the position of the laser on the reticle 15 so as to ensure the precision of the optical centering device.
The optical centering device is installed by connecting one end of a long rope with the lifting lug 1 of the optical centering device. The maintainer climbs the top cover, inserts the optical centering device into the corresponding guide post through hole of the top cover flange 10, and fixes the other end of the long rope on the top cover lifting appliance. The target 11 is mounted in a screw hole at the upper part of the guide post 12.
The auxiliary centering of the top cover of the pressure vessel is that the top cover is lifted to the upper part of the reactor core, and the lifting main command can directly observe the relative position of the laser point emitted by the emitter 6 and the target 11, and find the centering position by adjusting. The top cover is slowly lowered until the guide posts 12 contact the lower end cap 5 and eject the laser emitting device from the through holes. The head is continued to be lowered into position in the core.
The optical centering device is removed and an inspector removes the laser emitting device from the top cover using a long string.
Claims (3)
1. The optical centering device for hoisting the top cover of the pressure vessel of the pressurized water reactor unit comprises a transmitting device, a receiving device and a calibrating device, wherein the transmitting device comprises a lifting lug (1), a connector (2), a supporting seat (4), a bottom end cover (5), a transmitter (6) and a flange (10), the lifting lug (1) is arranged at the upper end of a supporting head (2) through threaded connection, the supporting head (2) is connected to the supporting seat (4) through a bolt (3), the receiving device comprises a target (11) and a guide post (12), and the target (11) is arranged on the guide post (12);
The device is characterized in that the supporting seat (4) is a hollow disc, the central part of the supporting seat is provided with threads, the emitter (6) is arranged in the fixed sleeve (7), the fixed sleeve (7) is fixedly connected with the supporting seat (4) through the central threads, the fixed sleeve (7) is fastened through the locking nut (9), and 6 adjusting screws (8) penetrate through the fixed sleeve (7) to adjust the coaxiality of the emitter (6) and the supporting seat (4);
The calibrating device comprises a calibrating cylinder body (13), a guide plate (14), a cross mark (15) and a bottom plate (16), wherein the calibrating cylinder body (13) is of an integrated structure and is a hollow cylinder as a whole, the guide plate (14) is a disc, and a center hole is formed in the center part of the guide plate;
the center of the bottom plate (16) is a cross mark (15);
The connecting lines of the central holes of the cross mark (15) and the guide plate (14) are coaxial with the central line of the calibration cylinder body (13);
The bottom end cover (5) is connected with the supporting seat (4) through a long bolt, and the end cover wall of the bottom end cover (5) is tightly contacted with the central inner wall of the through hole of the flange (10), the center of the end cover of the bottom end cover (5) is provided with a through hole, and the diameter of the through hole is the same as that of the emitter (6);
The guide posts (12) are arranged on screw holes distributed in the annular shape of the pressure vessel.
2. The device of claim 1, wherein the flange (10) is uniformly provided with annular through holes, and the diameter of the supporting seat (4) is larger than the inner diameter of the through holes of the flange (10).
3. The device according to claim 1, wherein the connector (2) is of a frame structure, the emitter (6) is of a cylindrical shape, penetrates through the middle of the connector (2) and the fixing sleeve (7), and the bottom is positioned above the end cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512196.5A CN112086213B (en) | 2019-06-13 | 2019-06-13 | An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512196.5A CN112086213B (en) | 2019-06-13 | 2019-06-13 | An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112086213A CN112086213A (en) | 2020-12-15 |
| CN112086213B true CN112086213B (en) | 2025-02-14 |
Family
ID=73733760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910512196.5A Active CN112086213B (en) | 2019-06-13 | 2019-06-13 | An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112086213B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116266487B (en) * | 2021-12-16 | 2024-11-22 | 中国核工业第五建设有限公司 | Auxiliary installation assembly and installation method of reactor pressure vessel |
| CN116052916B (en) * | 2022-12-28 | 2025-10-17 | 中核核电运行管理有限公司 | Length-switchable reactor core guide column operation tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210805253U (en) * | 2019-06-13 | 2020-06-19 | 中核核电运行管理有限公司 | Optical centering device for hoisting top cover of pressure vessel of pressurized water reactor unit |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2530015B2 (en) * | 1988-11-25 | 1996-09-04 | 株式会社東芝 | Inspection device for reactor internals |
| CN103296845B (en) * | 2013-04-22 | 2015-03-11 | 宁波富仕达电力工程有限责任公司 | Centring method in process of mounting generator rotor in threading mode |
| KR101651412B1 (en) * | 2014-11-20 | 2016-08-26 | 두산중공업 주식회사 | Reactor core support barrel aligment device and aligment method for an internal sturcture |
| CN104759861B (en) * | 2015-04-01 | 2017-03-08 | 中船黄埔文冲船舶有限公司 | Marine shafting laser alignment frock and centering installation method based on gear-box centering |
| CN105223969B (en) * | 2015-09-29 | 2018-06-15 | 河南科技大学 | A kind of sensor mounting adjustment system and laser leveling benchmark device |
| CN105783891B (en) * | 2016-03-21 | 2018-09-04 | 东方电气（武汉）核设备有限公司 | A kind of method of PWR of Nuclear Power Station in-pile component laser alignment centering |
| CN206223443U (en) * | 2016-11-08 | 2017-06-06 | 宝沃汽车（中国）有限公司 | A kind of bench test engine centering cubing |
| CN207585548U (en) * | 2017-09-24 | 2018-07-06 | 长春理工大学 | A kind of two-way centering laser alignment adjusting apparatus |
| CN107887044B (en) * | 2017-10-27 | 2019-07-19 | 三门核电有限公司 | A kind of reactor lower part in-pile component underwater centralising device at a distance |
| CN109668530B (en) * | 2019-01-29 | 2021-02-02 | 广州文冲船舶修造有限公司 | Shaft and shaft hole centering detection method and centering detection device |
-
2019
- 2019-06-13 CN CN201910512196.5A patent/CN112086213B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210805253U (en) * | 2019-06-13 | 2020-06-19 | 中核核电运行管理有限公司 | Optical centering device for hoisting top cover of pressure vessel of pressurized water reactor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112086213A (en) | 2020-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112086213B (en) | An optical centering device for lifting the top cover of the pressure vessel of a pressurized water reactor unit | |
| CN1023848C (en) | Pressurized water nuclear reactor core detection device and loading and unloading method and device thereof | |
| CN103474112A (en) | Reactor internal hoisting tool | |
| CN218566414U (en) | Support for surface displacement observation pier additionally provided with GNSS (global navigation satellite system) deformation monitoring equipment | |
| CN210805253U (en) | Optical centering device for hoisting top cover of pressure vessel of pressurized water reactor unit | |
| CN1841569B (en) | Method and device for changing nuclear reactor upper component at least a thermoelectric couple column | |
| CN206421827U (en) | A kind of multi-function device debugged available for fuel manipulator crane | |
| CN111310300A (en) | Nuclear power station reactor internals anti-break assembly bottom plate measuring method | |
| CN109854527B (en) | Locking shielding tool for shielding main pump | |
| CN115083639B (en) | Nuclear power plant pressure vessel guide bolt device with switchable height and hoisting method | |
| CN109573807B (en) | Top cover lifting appliance for pressure vessel reloading of ocean nuclear power platform and lifting method thereof | |
| CN111354490B (en) | Centering device suitable for pressurized water reactor pressure vessel top cap reinstallation | |
| CN212647891U (en) | Pressure vessel top cover and in-pile component guiding device | |
| CN210795530U (en) | Mechanical centering device for hoisting top cover of pressure vessel of pressurized water reactor unit | |
| CN111477371B (en) | A pressure vessel top cover and internal component guide device and hoisting method | |
| CN201319265Y (en) | Unlocking and checking device of control rod driving rod | |
| CN111468942A (en) | Large container internal part assembling device and using method | |
| CN211742685U (en) | Underwater storage container for sleeve screw of upper tube seat of fuel assembly | |
| CN203732070U (en) | Measurement device for center line of hoisting hole of barrel flange of reactor internal | |
| CN215868660U (en) | Hoisting device for position indicator | |
| CN108231219A (en) | Nuclear power is precious with long-range dismantlement of overlength sleeve and hoist and mount integrated device | |
| CN212146263U (en) | Reactor main seal face bolt repacking positioning tool | |
| CN222860991U (en) | A guiding device suitable for hoisting large reactor components in nuclear power plants | |
| CN116013560B (en) | A core guide column with switchable length | |
| CN216577645U (en) | Pump cover assembly and disassembly tools |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |