CN204834062U - Nuclear reactor pressure shell control rod drive mechanism sealing device - Google Patents
Nuclear reactor pressure shell control rod drive mechanism sealing device Download PDFInfo
- Publication number
- CN204834062U CN204834062U CN201520420345.2U CN201520420345U CN204834062U CN 204834062 U CN204834062 U CN 204834062U CN 201520420345 U CN201520420345 U CN 201520420345U CN 204834062 U CN204834062 U CN 204834062U
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- CN
- China
- Prior art keywords
- nuclear reactor
- intubate
- nut
- pressure shell
- reactor pressure
- 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.)
- 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 utility model belongs to the technical field of the nuclear reactor technique and specifically relates to a nuclear reactor pressure shell control rod drive mechanism sealing device, it includes knob, adjusting nut, compression spring, intubate and inserted bar, adjusting nut and compression spring cup joint respectively in the intubate, and the inserted bar runs through in the knob from top to bottom in proper order, transfers and connects nut and intubate. Adjusting nut still is provided with first nut with the knob junction, be provided with the steering yoke of two symmetric distributions of each other on the lateral wall of adjusting nut upper portion, the adjusting nut lower extreme still is connected with the screw thread plug. This practical beneficial effect is: the prevention of reactor pressure shell is leaked has protectiveness to nuclear reactor's safe operation improves, can remain to be made the nuclear energy power generation fuel availability to promote in time to the damage prevention of reactor component, the leakproofness be good in addition, has very strong practicality simultaneously.
Description
Technical field
The utility model relates to nuclear reactor technology field, especially a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff.
Background technology
In nuclear power station operational process, with CRDM (control rod drive mechanisms (CRD)) drived control rod, control the reactivity of reactor.Pneumatic shell is the critical piece of CRDM, and it is connected with pressure vessels top cover base by internal thread.Due to the pressure-bearing boundary that pneumatic shell and base are reactor-loops, high temperature, high pressure and high radioactivity to be subject at nuclear power station run duration always, therefore in order to prevent radiomaterial from leaking, after pneumatic shell has been connected with pressure vessels top cover base, need to seal the two further.
At present; CRDM pneumatic shell and pressure vessels top cover base mainly adopt TIG to weld (non-melt pole inert gas tungsten electrode is protected and welded) and seal; detailed process is: after pneumatic shell has been connected with base; utilize automatic welder(welding machine); by TIG weldering, the junction of the two is welded; completed by TIG weld seam and connect sealing, leak to prevent primary Ioops radiomaterial.Although above-mentioned encapsulating method is simple, but but there is following shortcoming: technical requirement is high: TIG welds connected mode and requires higher to the operative skill of operating personnel, construction enterprises must turn out the welding operation work of CRDM seal weld qualification, can carry out CRDM seal welding; Welding job amount is large: in nuclear power building course, and CRDM seal weld construction often continues 1 ~ 2 month, and weld long in time limit, welding job amount is large; Inconvenient maintenance: in the in-service maintenance process of nuclear power station, just can carry out the maintenance of CRDM internals, bring no small trouble to maintenance job after needing cutting sealing weld seam.
Therefore, the pneumatic shell hermetically-sealed construction that a kind of nuclear power station reactor control stick driving mechanism that can solve the problem is provided is necessary.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide that a kind of sealing is good, the simple nuclear reactor pressure shell leakage-preventing sealing device of structure.
To achieve these goals, the utility model adopts following technical scheme:
A kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff, it comprises knob, setting nut, Compress Spring, intubate and inserted link; Described setting nut and Compress Spring are socketed on intubate respectively, and described inserted link is from top to bottom successively through knob, transfer nut and intubate.
Preferably, described setting nut and knob junction are also provided with the first nut; Described setting nut upper portion side wall is provided with two mutual symmetrical steering yokes, described setting nut lower end is also connected with threaded pin.
Preferably, described intubate upper end is provided with screw member, and described screw member is connected through setting nut with the first nut thread, and described intubate bottom is provided with the annular flange flange for supporting Compress Spring.
Preferably, described inserted link lower end is provided with the plush copper of diameter slightly larger than upper part.
Preferably, described Compress Spring and annular flange flange junction are also provided with a packing ring.
Owing to adopting technique scheme, this practical beneficial effect is: the pre-anti-leak of reactor vessel has protection, to improve the safe operation of nuclear reactor; Can prevent the damage of reactor component in time, need nuclear energy power generation fuel availability is promoted, sealing is good in addition, has very strong practicality simultaneously.
Accompanying drawing explanation
Fig. 1 is nuclear reactor structure schematic diagram;
Fig. 2 is nuclear reactor pressure shell exhaust system structure schematic diagram;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is decomposition texture schematic diagram of the present utility model;
Fig. 5 is schematic cross-section of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Be illustrated in figure 1 a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff, pressure vessel 1 upper end is provided with control rod drive mechanisms (CRD) 10, shown in Fig. 2 to Fig. 4, a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) schematic diagram of sealing device, it comprises knob 46, setting nut 40, Compress Spring 445, intubate 44 and inserted link 48; Setting nut 40 and Compress Spring 45 are socketed on intubate 44 respectively, and inserted link 48 is from top to bottom successively through knob 46, setting nut 40 and intubate 44.Setting nut 40 and knob 46 junction are also provided with the first nut 47; Setting nut 40 upper portion side wall is provided with two mutual symmetrical steering yokes 43, setting nut 43 lower end is also connected with threaded pin 41.
In addition, intubate 44 upper end is provided with screw member 44a, and screw member 44a is connected through setting nut 43 with the first nut thread 47, and intubate 44 bottom is provided with the annular flange flange 44c for supporting Compress Spring 45.Inserted link 48 lower end is provided with the plush copper 48b of diameter slightly larger than upper part, and plush copper 48b better can complete sealing; Compress Spring 45 and annular flange flange 44c junction are also provided with a packing ring 45a, and Compress Spring 45 can make intubate 44 remain the power of compression, seal can not be pitched because of the time, can strengthen sealing.Its middle washer 45a effectively prevents Compress Spring 45 from annular flange flange 44c is galled damage.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. a nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff. it is characterized in that: it comprises knob, setting nut, Compress Spring, intubate and inserted link; Described setting nut and Compress Spring are socketed on intubate respectively, and described inserted link is from top to bottom successively through knob, transfer nut and intubate.
2. a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff according to claim 1. it is characterized in that: described setting nut and knob junction are also provided with the first nut; Described setting nut upper portion side wall is provided with two mutual symmetrical steering yokes, described setting nut lower end is also connected with threaded pin.
3. a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff according to claim 1. it is characterized in that: described intubate upper end is provided with screw member, described screw member is connected through setting nut with the first nut thread, and described intubate bottom is provided with the annular flange flange for supporting Compress Spring.
4. a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff according to claim 1, is characterized in that: described inserted link lower end is provided with the plush copper of diameter slightly larger than upper part.
5. a kind of nuclear reactor pressure shell control rod drive mechanisms (CRD) packoff according to claim 1 or 3, is characterized in that: described Compress Spring and annular flange flange junction are also provided with a packing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520420345.2U CN204834062U (en) | 2015-06-17 | 2015-06-17 | Nuclear reactor pressure shell control rod drive mechanism sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520420345.2U CN204834062U (en) | 2015-06-17 | 2015-06-17 | Nuclear reactor pressure shell control rod drive mechanism sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204834062U true CN204834062U (en) | 2015-12-02 |
Family
ID=54691635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520420345.2U Expired - Fee Related CN204834062U (en) | 2015-06-17 | 2015-06-17 | Nuclear reactor pressure shell control rod drive mechanism sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204834062U (en) |
-
2015
- 2015-06-17 CN CN201520420345.2U patent/CN204834062U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20160617 |