CN103021482B - Nozzle sealing and connecting method for pressurized water reactor nuclear power station - Google Patents
Nozzle sealing and connecting method for pressurized water reactor nuclear power station Download PDFInfo
- Publication number
- CN103021482B CN103021482B CN201210500337.XA CN201210500337A CN103021482B CN 103021482 B CN103021482 B CN 103021482B CN 201210500337 A CN201210500337 A CN 201210500337A CN 103021482 B CN103021482 B CN 103021482B
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- China
- Prior art keywords
- hanging basket
- ozzle
- nuclear power
- outlet nozzle
- pressure vessel
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a nozzle sealing and connecting method for a pressurized water reactor nuclear power station and belongs to nuclear power station part sealing devices and technical ranges. According to the method, a contact end face of a hanging basket outlet nozzle and a pressure container outlet nozzle is modified into a plane; a flange disc is welded at the end of the hanging basket outlet nozzle and the end of the pressure container outlet nozzle; round grooves are respectively formed at corresponding positions on two flange disc surfaces; an O-shaped sealing ring is arranged in each groove; and the height of the O-shaped sealing ring is larger than the distance between the hanging basket outlet nozzle and the pressure container outlet nozzle, so that the hanging basket outlet nozzle and the pressure container outlet nozzle are effectively pressed and sealed through the sealing ring. Effective sealing connection at the hanging basket outlet nozzle and the pressure container outlet nozzle of the pressurized water reactor nuclear power station is realized, the flow of a coolant which is not heated by a reactor core and directly flows from the gap between the inner wall of a pressure container and the hanging basket outlet nozzle to the pressure container outlet nozzle is reduced, the cooling effect is improved, the structure is simple, the overall structure of the hanging basket and the pressure container is not modified, and smooth lifting and discharging of the hanging basket are not influenced.
Description
Technical field
The invention belongs to nuclear power station parts packoff and technical scope, particularly a kind of pressurized-water reactor nuclear power plant ozzle seal connecting method.Particularly relate to hanging basket tube nozzle outlet to be connected with the Butt sealing of pressure vessel outlet ozzle.
Background technology
At present, pressurized-water reactor nuclear power plant is the needs ensureing that hanging basket hangs out when need keep in repair smoothly, and the hanging basket outlet ozzle 1 shown in Fig. 1 adopts direct seamed connected mode of docking with pressure vessel outlet ozzle 2, and welding or other be effectively tightly connected.Under normal operating conditions, when primary Ioops cooling medium flows in pressure vessel, the coolant flow directly flowing to pressure vessel outlet ozzle from the gap between internal pressure vessel walls and hanging basket ozzle accounts for greatly 1% of overall coolant flow rate.This part cooling medium directly flows out without reactor core heating, affects generating efficiency and the economic benefit of nuclear power station, creates harmful effect simultaneously to equipment.
Summary of the invention
The object of this invention is to provide a kind of pressurized-water reactor nuclear power plant ozzle seal connecting method, it is characterized in that, this pressurized-water reactor nuclear power plant ozzle seal connecting method is the mode adopting sealing docking, first hanging basket is exported ozzle and make plane into the end face that contacts of pressure vessel outlet ozzle, two flange surfaces are all θ overturning angle with horizontal direction; On the flange surface of the two end, one circular groove is respectively opened in corresponding position, O type sealing ring is placed in groove, the height of O type sealing ring is greater than the distance between hanging basket outlet ozzle and pressure vessel nozzle, hanging basket outlet ozzle is connected without any bolt with between pressure vessel outlet ozzle, there is provided sealing snap-in force by the elasticity of dead weight of basket and O type sealing ring, realize pressurized-water reactor nuclear power plant hanging basket outlet ozzle and pressure vessel outlet ozzle place be effectively tightly connected; When hanging basket needs repairing, it is vertically hung out pressure vessel, syndeton the hanging out smoothly without affecting hanging basket between hanging basket outlet ozzle and pressure vessel outlet ozzle.
Described O type sealing ring is split ring, and a built-in volute spring.
Described sealing ring is soft metal or the rubber of not opening energy pressure resistant container working temperature.
Described θ angle, depending on real space size between pressure vessel and hanging basket, is 5-10.
Beneficial outcomes of the present invention is, this method of attachment connects without any bolt, sealing snap-in force is provided by the elasticity of dead weight of basket and O type sealing ring, realize pressurized-water reactor nuclear power plant hanging basket outlet ozzle and pressure vessel outlet ozzle place be effectively tightly connected, reduce the coolant flow directly flowing to pressure vessel outlet ozzle without reactor core heating from the gap between internal pressure vessel walls and hanging basket outlet ozzle, improve cooling effect, structure is simple, to hanging basket and pressure vessel unitary construction without change, and the smooth lifting of hanging basket can not be affected and hang out, and install, dismantle all very convenient.
Accompanying drawing explanation
Fig. 1 is existing pressurized-water reactor nuclear power plant core barrel and pressure vessel connection layout.
Fig. 2 is pressurized-water reactor nuclear power plant hanging basket outlet ozzle and the effective Hermetical connecting structure schematic diagram in pressure vessel outlet ozzle place.
Fig. 3 is built-in helical spring opening O type seal ring structure schematic diagram.
Fig. 4 is the A-A diagrammatic cross-section of Fig. 3.
In figure, are 1. hanging basket outlet ozzles, being 2. pressure vessel outlet ozzles, is 3. O type sealing rings, 4. ring flange, 5. groove, 6-volute spring, 7-silver coating.
Embodiment
The present invention is to provide a kind of pressurized-water reactor nuclear power plant ozzle seal connecting method.Below in conjunction with drawings and Examples, the present invention is further described.
Figure 2 shows that pressurized-water reactor nuclear power plant hanging basket outlet ozzle and the effective Hermetical connecting structure schematic diagram in pressure vessel outlet ozzle place.
This pressurized-water reactor nuclear power plant ozzle seal connecting method first hanging basket is exported ozzle 1 to make plane into the end face that contacts of pressure vessel outlet ozzle 2, and all weld a ring flange 4 in the two end, groove 5 circular or square together with respectively opening with corresponding position on the flange surface of the end of pressure vessel outlet ozzle 2 at hanging basket outlet ozzle 1, wherein, two flange surfaces are with horizontal direction is θ overturning angle.θ angle is decided to be 5-10 depending on real space size between pressure vessel and hanging basket
., the present invention elects 8 as
.。Place O type sealing ring 3 in groove 5, this O type sealing ring is split ring, and a built-in volute spring 6, and plate one deck silver 7 (as shown in Figure 3,4) at O type sealing ring 3 outer surface; Or O type sealing ring is soft metal or the rubber of not opening energy pressure resistant container working temperature;
On prior flange surface O type sealing ring 3 being fixed on hanging basket outlet ozzle 1 in groove 5, hanging basket is lifted in entrance pressure force container, because the height of O type sealing ring is greater than the distance between hanging basket outlet ozzle and pressure vessel outlet ozzle, hanging basket outlet ozzle is connected without any bolt with between pressure vessel outlet ozzle, there is provided sealing snap-in force by the elasticity of dead weight of basket and O type sealing ring, realize pressurized-water reactor nuclear power plant hanging basket outlet ozzle and pressure vessel outlet ozzle place be effectively tightly connected; When hanging basket needs repairing, it is vertically lifted up into, hangs out pressure vessel, the syndeton between hanging basket outlet ozzle and pressure vessel outlet ozzle on the lifting up into smoothly of hanging basket, hang out without affect, thus reach the object of effective sealing connection.
Claims (4)
1. a pressurized-water reactor nuclear power plant ozzle seal connecting method, it is characterized in that, this pressurized-water reactor nuclear power plant ozzle seal connecting method is the mode adopting sealing docking, first hanging basket is exported ozzle and make plane into the end face that contacts of pressure vessel outlet ozzle, and all welding a ring flange in the two end, two flange surfaces are all θ overturning angle with horizontal direction; On the flange surface of the two end, one circular groove is respectively opened in corresponding position, O type sealing ring is placed in groove, the height of O type sealing ring is greater than the distance between hanging basket outlet ozzle and pressure vessel nozzle, hanging basket outlet ozzle is connected without any bolt with between pressure vessel outlet ozzle, there is provided sealing snap-in force by the elasticity of dead weight of basket and O type sealing ring, realize pressurized-water reactor nuclear power plant hanging basket outlet ozzle and pressure vessel outlet ozzle place be effectively tightly connected; When hanging basket needs repairing, it is vertically hung out pressure vessel, syndeton the hanging out smoothly without affecting hanging basket between hanging basket outlet ozzle and pressure vessel outlet ozzle.
2. pressurized-water reactor nuclear power plant ozzle seal connecting method according to claim 1, it is characterized in that, described O type sealing ring is split ring, and a built-in volute spring.
3. pressurized-water reactor nuclear power plant ozzle seal connecting method according to claim 1, is characterized in that, described sealing ring be not opening can the soft metal of pressure resistant container working temperature or rubber.
4. pressurized-water reactor nuclear power plant ozzle seal connecting method according to claim 2, it is characterized in that, described θ angle, depending on real space size between pressure vessel and hanging basket, elects 5-10 as
.。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210500337.XA CN103021482B (en) | 2012-11-29 | 2012-11-29 | Nozzle sealing and connecting method for pressurized water reactor nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210500337.XA CN103021482B (en) | 2012-11-29 | 2012-11-29 | Nozzle sealing and connecting method for pressurized water reactor nuclear power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103021482A CN103021482A (en) | 2013-04-03 |
| CN103021482B true CN103021482B (en) | 2015-04-22 |
Family
ID=47969990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210500337.XA Expired - Fee Related CN103021482B (en) | 2012-11-29 | 2012-11-29 | Nozzle sealing and connecting method for pressurized water reactor nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103021482B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107494A (en) * | 1985-11-06 | 1987-06-03 | 西屋电气公司 | The core barrel supporting system of nuclear reactor |
| KR20120022415A (en) * | 2010-09-02 | 2012-03-12 | 한국원자력연구원 | Pressure vessel cooling device |
-
2012
- 2012-11-29 CN CN201210500337.XA patent/CN103021482B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107494A (en) * | 1985-11-06 | 1987-06-03 | 西屋电气公司 | The core barrel supporting system of nuclear reactor |
| KR20120022415A (en) * | 2010-09-02 | 2012-03-12 | 한국원자력연구원 | Pressure vessel cooling device |
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| Publication number | Publication date |
|---|---|
| CN103021482A (en) | 2013-04-03 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20201129 |