CN108269625A - A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole - Google Patents
A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole Download PDFInfo
- Publication number
- CN108269625A CN108269625A CN201611259256.XA CN201611259256A CN108269625A CN 108269625 A CN108269625 A CN 108269625A CN 201611259256 A CN201611259256 A CN 201611259256A CN 108269625 A CN108269625 A CN 108269625A
- Authority
- CN
- China
- Prior art keywords
- hole
- plug
- hand hole
- sealing surface
- foreign matter
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 title claims abstract description 34
- 230000000903 blocking effect Effects 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 238000013329 compounding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 7
- 206010017000 Foreign body aspiration Diseases 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
-
- 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)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The present invention relates to nuclear power plant's operation and maintenance technical fields, and in particular to a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole, including：Plug, sealing surface cover sheet, operating handle, rubber ring；Plug generally cylindrical structure, plug size and steam generator hand hole dimensional fits, plug periphery wall are from top to bottom equipped with multi-turn groove, and rubber ring is compressed in embedded groove；The upper part of the plug sealing surface center is equipped with through the equilibrium air pressure through-hole of plug and around 3 uniformly distributed tapped blind holes of equilibrium air pressure through-hole；Equilibrium air pressure through-hole is equipped with internal thread, for compounding practice handle screw thread through operation.The present invention has a function of blocking hand hole, anti-foreign matter, protection hand hole sealing surface, simple in structure, easy for installation, operation is reliable, the light transport easy to carry of weight；It is avoided that in upkeep operation and foreign-body aspiration, sealing surface scuffing equivalent risk occurs.
Description
Technical field
The present invention relates to nuclear power plant's operation and maintenance technical fields, and in particular to a kind of heavy water reactor Steam Generators in NPP
The multi-functional anti-foreign matter blocking component of hand hole.
Background technology
Steam generator is heavy water reactor nuclear power plant primary Ioops core level-one key equipment, main between nuclear power plant one, secondary circuit
The periodic preventative maintenance work of steam generator is carried out in the pressure boundary wanted, and ensures that steam generator structural integrity safely may be used
It leans on, operation of stabilizing the economy to npp safety is of great significance.
Every unit of heavy water reactor nuclear power plant totally 4 steam generators, totally 3 hands above the tube sheet of every steam generator
Hole.These hand holes are used for determining for steam generator secondary side during each planned planned outage as unique access path
Phase video check and flushing work.
The each overhaul of heavy water reactor nuclear power plant needs to open these hand holes to be prevented accordingly with carrying out steam generator secondary side
Property maintenance, once the foreign matters such as clast, Work tool are entered by hand hole inside steam generator, by extremely difficult taking-up and cleaning, residual
Foreign matter will also constitute a serious threat to the safe operation of steam generator.In addition, Work tool etc. during preventative maintenance
The scuffing of hand hole sealing surface is easily caused, it is big, of high cost that scene is sealed face reparation difficulty.Therefore, it is needed in entire maintenance process
Foreign matter protection is carried out to hand hole and hand hole sealing surface is protected etc..
Hand hole is carried out generally in a manner that easy rigid plastics plug adds tape-stripping in service work before
Foreign matter protects and sealing surface protection, is primarily present following deficiency：
1st, plug installation is unreliable, may be fallen into inside steam generator as foreign matter.
2nd, before there are gap, plug may cause metal fragment to enter steam generator when extracting for plug and hand hole inner wall
It is internal.
3rd, since the liquid level of the steam generator secondary side during closure, pressure etc. change, steam may be caused
Negative pressure is formed inside generator, plug is likely difficult to extract or be inhaled into inside steam generator.
4th, hand hole sealing surface is protected by the way of tape-stripping, and forms of protection is unreliable, and sealing surface was overhauling
It is damaged in journey by Work tool.
5th, plug uses tape-stripping, and the halogen in rubber belt material may be remained in around hand hole, cause to seal
Corrode in face.
Therefore need to develop a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole to hand hole
Effectively block and protect.
Invention content
Present invention aims at providing a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole,
The component can block hand hole after evaporator hand hole opening, prevent foreign matter from entering steam generator and being sealed to hand hole
Face is reliably protected, meanwhile, using 3 grades of rubber seal filling plugs with the gap of hand hole inner wall, energy when plug is extracted
It is enough directly to take the foreign matters such as the clast in gap out of hand hole inner wall；There is provided operating handles, make plug dismounting convenient；There is provided flat
Weigh air pressure through-hole, plug can be avoided to be inhaled into steam generator by equilibrium vapor generator external and internal pressure in maintenance process
Portion.
Technical scheme is as follows：
A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole, including：Plug, sealing surface are protected
Protecting cover plate, operating handle, rubber ring；Plug generally cylindrical structure, plug size and steam generator hand hole dimensional fits,
Plug periphery wall is from top to bottom equipped with multi-turn groove, and rubber ring is compressed in embedded groove；The upper part of the plug sealing surface center is equipped with and passes through
Wear the equilibrium air pressure through-hole of plug and around 3 uniformly distributed tapped blind holes of equilibrium air pressure through-hole；Equilibrium air pressure through-hole is equipped with interior spiral shell
Line, for compounding practice handle screw thread through operation.
Sealing surface cover sheet center as described above is equipped with and the corresponding cover plate through hole of equilibrium air pressure through-hole, cover plate through hole
Surrounding is uniformly distributed and corresponding 3 bolt holes of tapped blind hole, bolt pass through tapped through hole to screw in tapped blind hole and protect sealing surface
Protecting cover plate is fixed on the sealing surface of plug.
Operating handle outer wall as described above is equipped with the equilibrium air pressure through hole whorl cooperation on external screw thread, with plug.
Cover plate through hole diameter as described above is more than operating handle outer diameter.
Sealing surface cover sheet diameter as described above is more than hand hole sealing surface outer diameter, for covering hand hole sealing surface comprehensively
Lid protection.
Plug and sealing surface cover sheet material as described above are polytetrafluoroethylene (PTFE) material.
The remarkable result of the present invention is：Have the function of blocking hand hole, anti-foreign matter, protection hand hole sealing surface, tie simultaneously
Structure simple functions are perfect, the light transport easy to carry of weight；Easy for installation, operation is reliable, have passed through repeatedly maintenance verification, and energy
It avoids that foreign-body aspiration, sealing surface scuffing equivalent risk occur in operation.
Description of the drawings
Fig. 1 is the multi-functional anti-foreign matter blocking component structure diagram of steam generator hand hole
Fig. 2 is the multi-functional anti-foreign matter blocking component sealing surface cover sheet schematic diagram of steam generator hand hole
Fig. 3 is the multi-functional anti-foreign matter block head vertical view of steam generator hand hole
Fig. 4 is the multi-functional anti-foreign matter blocking component scheme of installation of steam generator hand hole
In figure：1- operating handles, 2- bolts, 3- sealing surface cover sheets, 4- plugs, 5- rubber rings, 6- equilibrium air pressures lead to
Hole, 7- cover plate through holes, 8- tapped through holes, 9- tapped blind holes, 10- steam generator bodies.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the present invention.
A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole, including：Plug 4, sealing surface
Cover sheet 3, operating handle 1, bolt 2, rubber ring 5.The generally cylindrical structure of plug 4,4 size of plug and steam generator
Hand hole dimensional fits, 4 periphery wall of plug are from top to bottom equipped with multi-turn groove, and rubber ring 5 is compressed in embedded groove, presses plug 4
In compact imbeding steam generator hand hole, thorough seal is carried out by rubber ring 5, prevents in maintenance process external pressure in steam generator
Difference causes in foreign-body aspiration steam generator, and takes the foreign matter in plug and hand hole inner wall gap out of when taking out plug；Plug 4
Top seal face center is equipped with through the equilibrium air pressure through-hole 6 of plug 4 and blind around 3 uniformly distributed screw threads of equilibrium air pressure through-hole 6
Hole 9, equilibrium air pressure through-hole 6 are used for equilibrium vapor generator external and internal pressure in maintenance process and plug 4 are avoided to be inhaled into steam generation
Inside device；Equilibrium air pressure through-hole 6 is equipped with internal thread, for 1 screw thread of compounding practice handle through operation；Sealing surface cover sheet 3
Center be equipped with the 6 corresponding cover plate through hole 7 of equilibrium air pressure through-hole on plug 4, for operating handle 1 pass through sealing surface protection
Cover board 3, which enters in equilibrium air pressure through-hole 6, to be operated, and 7 surrounding of cover plate through hole is evenly distributed with and 9 corresponding 3 bolts of tapped blind hole
Through-hole 8, bolt 2 pass through tapped through hole 8 to screw in tapped blind hole 9 and are fixed on sealing surface cover sheet 3 on the sealing surface of plug 4,
For protecting sealing surface, prevent from scratching sealing surface in maintenance.
1 outer wall of operating handle is equipped with 6 thread fitting of equilibrium air pressure through-hole on external screw thread, with plug 4, for working as steam hair
Plug 4 is taken out from hand hole when generating negative pressure in raw device hand hole.
7 diameter of cover plate through hole is more than the outer diameter of operating handle 1, and handle 1 easy to operation passes through cover plate through hole to screw in Balance Air
It presses in through-hole 6.
3 diameter of sealing surface cover sheet is more than the sealing surface of steam generator hand hole, for covering for hand hole sealing surface comprehensively
Lid protection.
Plug 4 and 3 material of sealing surface cover sheet are polytetrafluoroethylene (PTFE) material.
The multi-functional anti-foreign matter plug component installation of steam generator hand hole and dismounting application method：
The multi-functional anti-foreign matter plug installation of steam generator hand hole：Before evaporator hand hole opening, operating handle 1 is screwed in
In equilibrium air pressure through-hole 6 at half, after evaporator hand hole is opened, plug 4 is inserted into hand hole by operating handle 1, is made
4 surface of plug is concordant with hand hole sealing surface, completes plug installation.
The multi-functional anti-foreign matter plug dismounting of steam generator hand hole：First by operating handle 1 from 6 inward turning of equilibrium air pressure through-hole
Go out, to ensure steam generator hand hole inside and outside air pressure balance, then by 1 precession equilibrium air pressure through-hole 6 of operating handle, then pass through
Plug 4 is extracted hand hole by operating handle 1.
It when the work on steam generator hand hole sealing surface suspends temporarily, needs to install sealing surface cover sheet 3 additional, to protect
Protect steam generator hand hole sealing surface；When installing sealing surface cover sheet 3, first by operating handle 1 out of equilibrium air pressure through-hole 6
It screws out, to ensure steam generator hand hole inside and outside air pressure balance, then by 3 central cover plate through-hole 7 of sealing surface cover sheet and plug 4
Upper corresponding equilibrium air pressure through-hole 6 is aligned, and is passed through bolt hole 9 and tightened bolt 2 successively and be fixed on sealing surface cover sheet 3
On 4 sealing surface of plug, then by operating handle 1 from the cover plate through hole 7 on sealing surface cover sheet 3 be inserted into and precession plug 4 in
In equilibrium air pressure through-hole 6, to carry out the hermetically sealed closure of steam generator hand hole.
When sealing surface cover sheet 3 is dismantled, first operating handle 1 is screwed out in equilibrium air pressure through-hole 6 out of plug 4,
Then the bolt 2 being fixed on sealing surface cover sheet 3 is backed out, with removing sealing surface cover sheet 3.
Claims (6)
- A kind of 1. multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole, which is characterized in that the hand hole Multi-functional anti-foreign matter blocking component includes：Operating handle (1), sealing surface cover sheet (3), plug (4), rubber ring (5)；Plug (4) generally cylindrical structure, plug (4) size and steam generator hand hole dimensional fits, plug (4) periphery wall is from top to bottom Equipped with multi-turn groove, rubber ring (5) is compressed in embedded groove；Plug (4) top seal face center is equipped with through the flat of plug (4) Weigh air pressure through-hole (6) and around 3 uniformly distributed tapped blind holes (9) of equilibrium air pressure through-hole (6)；Equilibrium air pressure through-hole (6) is equipped with interior Screw thread, for compounding practice handle (1) screw thread through operation.
- 2. a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole as described in claim 1, special Sign is that sealing surface cover sheet (3) center is equipped with and equilibrium air pressure through-hole (6) corresponding cover plate through hole (7), cover board Uniformly distributed and corresponding 3 bolt holes (8) of tapped blind hole (9) on through-hole (7), bolt (2) screw in spiral shell across tapped through hole (8) Sealing surface cover sheet (3) is fixed on the upper of plug (4) by line blind hole (9).
- 3. a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole as described in claim 1, special Sign is that operating handle (1) outer wall is equipped with equilibrium air pressure through-hole (6) thread fitting in external screw thread, with plug (4).
- 4. a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole as claimed in claim 2, special Sign is that cover plate through hole (7) diameter is more than operating handle (1) outer diameter.
- 5. a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole as claimed in claim 2, special Sign is that seal protection cover board (3) diameter is more than hand hole sealing surface outer diameter, is protected for comprehensive covering of hand hole sealing surface Shield.
- 6. a kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole as described in claim 1, special Sign is that the plug (4) and seal protection cover board (3) material are polytetrafluoroethylene (PTFE) material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611259256.XA CN108269625A (en) | 2016-12-30 | 2016-12-30 | A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611259256.XA CN108269625A (en) | 2016-12-30 | 2016-12-30 | A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108269625A true CN108269625A (en) | 2018-07-10 |
Family
ID=62754822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611259256.XA Pending CN108269625A (en) | 2016-12-30 | 2016-12-30 | A kind of multi-functional anti-foreign matter blocking component of heavy water reactor Steam Generators in NPP hand hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108269625A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577894A (en) * | 2020-05-27 | 2020-08-25 | 福建宁德核电有限公司 | Prevent foreign matter plugging device suitable for multiple bore |
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|---|---|---|---|---|
| GB190104424A (en) * | 1901-03-01 | 1901-05-04 | Gustav Duerr | Improvement relating to the Plugs or Handhole Covers for Steam Generators. |
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| GB688867A (en) * | 1949-10-20 | 1953-03-18 | Otto Afflerbach | Hand-hole and man-hole closures for steam boilers, compressed-air containers and the like |
| US5104611A (en) * | 1989-11-13 | 1992-04-14 | Combustion Engineering, Inc. | Flow blocker for access opening |
| FR2708080A1 (en) * | 1993-07-19 | 1995-01-27 | Framatome Sa | Assembly for the sealed closure of a tube for joining a container and a pipe, and use thereof |
| US20030047145A1 (en) * | 2001-08-29 | 2003-03-13 | Hyp Edward J. | Temporary plug cover for hole or port in steam generator of nuclear power plant |
| CN202525968U (en) * | 2012-03-26 | 2012-11-14 | 金陵科技学院 | Novel insulating bottle stopper |
| CN202636706U (en) * | 2012-03-26 | 2013-01-02 | 金陵科技学院 | Heat-insulating bottle plug |
| CN102853078A (en) * | 2012-09-18 | 2013-01-02 | 中国船舶重工集团公司第七�三研究所 | Conical inner pressure sealing mechanism for small-caliber connecting box of boiler |
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| CN203597831U (en) * | 2013-11-26 | 2014-05-21 | 浙江大学 | Vacuum bottle plug easy to take out |
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| GB536698A (en) * | 1940-01-15 | 1941-05-23 | Unit Superheater And Pipe Comp | Improvements in or relating to closures for hand-holes in vessels adapted to containfluid under high pressure |
| GB688867A (en) * | 1949-10-20 | 1953-03-18 | Otto Afflerbach | Hand-hole and man-hole closures for steam boilers, compressed-air containers and the like |
| US5104611A (en) * | 1989-11-13 | 1992-04-14 | Combustion Engineering, Inc. | Flow blocker for access opening |
| FR2708080A1 (en) * | 1993-07-19 | 1995-01-27 | Framatome Sa | Assembly for the sealed closure of a tube for joining a container and a pipe, and use thereof |
| US20030047145A1 (en) * | 2001-08-29 | 2003-03-13 | Hyp Edward J. | Temporary plug cover for hole or port in steam generator of nuclear power plant |
| CN202525968U (en) * | 2012-03-26 | 2012-11-14 | 金陵科技学院 | Novel insulating bottle stopper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577894A (en) * | 2020-05-27 | 2020-08-25 | 福建宁德核电有限公司 | Prevent foreign matter plugging device suitable for multiple bore |
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180710 |
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