CN205609227U - Reactor pressure vessel connection structure - Google Patents
Reactor pressure vessel connection structure Download PDFInfo
- Publication number
- CN205609227U CN205609227U CN201620372708.4U CN201620372708U CN205609227U CN 205609227 U CN205609227 U CN 205609227U CN 201620372708 U CN201620372708 U CN 201620372708U CN 205609227 U CN205609227 U CN 205609227U
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- thread segment
- nut
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- connecting bolt
- thread
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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 discloses a reactor pressure vessel connection structure, including the top cap flange, the vessel flange, connecting bolt and nut, the bolt through -hole has been seted up on the top cap flange, set up threaded blind hole on the vessel flange, connecting bolt tie -rod through -hole and screw thread blind hole screw -thread fit, the nut cooperates and compresses tightly the top cap flange on the vessel flange with connecting thread, connecting bolt includes the body of rod, set up in the first screw thread section of body of rod lower extreme, set up in the being used for second screw thread section be connected with the bolt adapter of body of rod upper end, set up with first screw thread section and second screw thread section between be used for the third screw thread section of being connected with the stretcher discount and set up the fourth screw thread section between first screw thread section and third screw thread section, first screw thread section and screw thread blind hole screw -thread fit, fourth screw thread section and nut screw -thread fit. The utility model discloses can accomplish connecting bolt's installation, pretension or dismantlement in short time more, greatly reduced the operating cycle.
Description
Technical field
This utility model relates to reactor pressure vessel attachment structure.
Background technology
Install at reactor and reload period, needing quick and safe installation or removal to fall the attachment structure between pressure vessels top cover and cylinder, to shorten reactor refuling and time between overhauls(TBO), and reduce the irradiation hazard of operator.
Currently, the connected mode between common pressure vessels top cover and cylinder has a following two kinds:
The most as shown in Figure 1, a cannelure 6 is machined outside vessel flange, in cannelure 6, corresponding spiro keyhole position installs in respect of cylinder side nut 7, the installation site of cylinder side nut 7 is regulated by block 8, kingbolt 9 is connected with vessel flange by cylinder side nut 7, is fixed on vessel flange by top cover flange by top nut 10 and pad 11.This structure is through hole due to vessel flange upper bolt hole, reduce the difficulty of processing of vessel flange upper bolt hole, be conducive to manufacturing, but connect owing to it exists nut bolt at two, add installation procedure and adjustment link, when particularly reloading and overhaul, dismounting and the adjustment of cylinder side, bottom nut 7 are limited by working place, are unfavorable for shortening the set-up time.
The most as shown in Figure 2, locking nut 12 and top nut 13 is screwed during installation, use heating that support 14 is heated to 350 DEG C～400 DEG C, support 14 expanded by heating, it is transferred to top nut 13 by backing plate 15, bolt 16 is stretched by top nut 13, then screws locking nut 12, reaches tools for bolts ' pretension requirement.This structure uses electrical heating method that kingbolt is carried out pretension, and heating-up temperature is higher, is unfavorable for the operation safety during installing, and cannot realize all bolt integral installations, is unfavorable for shortening the set-up time.
Utility model content
The purpose of this utility model is i.e. to overcome the deficiencies in the prior art, it is provided that a kind of reactor pressure vessel attachment structure, the installation or removal that this attachment structure can be quick and safe.
The purpose of this utility model is achieved through the following technical solutions:
Reactor pressure vessel attachment structure, including top cover flange, vessel flange, connecting bolt and nut, bolt hole is offered on top cover flange, tapped blind hole is offered on vessel flange, connecting bolt runs through bolt hole and tapped blind hole threaded engagement, nut coordinates and by top cover flange screw on vessel flange with being connected screw thread, connecting bolt includes the body of rod, it is arranged at the first thread segment of body of rod lower end, be arranged at body of rod upper end for the second thread segment being connected with adapter bolt, arrange with between the first thread segment and the second thread segment for the 3rd thread segment that is connected with stretching-machine discount and be arranged at the 4th thread segment between the first thread segment and the 3rd thread segment；First thread segment and tapped blind hole threaded engagement, the 4th thread segment coordinates with nut thread.
Operation principle of the present utility model is as follows:
Nut being threaded to the 4th thread segment and threadeds with the 4th thread segment, the second thread segment is connected with adapter bolt, and the 3rd thread segment is connected with the discount of stretching-machine.By stretching-machine electric rotating machine drive the first thread segment of adapter bolt to screw in tapped blind hole.Starting stretching-machine, connected by stretching-machine discount and the 3rd thread segment, connecting bolt is stretched by stretching-machine, after connecting bolt is elongated, and tightening nut, to realize pretightning force requirement when connecting bolt is installed, meet and after requiring, remove stretching-machine, complete to install.Unloading process is contrary with installation process step.
Owing to connecting bolt of the present utility model uses four sections of helicitic textures so that it is can be connected with adapter bolt and stretching-machine such that it is able to complete the installation of connecting bolt, pretension or dismounting at shorter time, greatly reduce the operation cycle simultaneously.
Further, also including being placed on described connecting bolt and pad between described top cover flange and described nut, the contact surface between described nut and pad is sphere.
Contact surface between nut and pad is sphere, when connecting bolt stand under load is bent, nut can produce relative slip, to offset the part flexural deformation of connecting bolt with the contact surface of pad, to reduce the bending stress of connecting bolt, improve service life and the margin of safety of connecting bolt.
Further, the diameter of described bolt hole is configured so that the gap between described bolt hole and the described body of rod can accommodate body of rod flexural deformation in described bolt hole.
The diameter of bolt hole is configured to above-mentioned form, it is possible to effectively alleviate the connecting bolt curvature effect that top cover flange distortion causes, improves service life and the margin of safety of connecting bolt.
Further, the diameter of described bolt hole is configured so that the nut insert blocking described tapped blind hole can pass through.
Produce corrosion for preventing from reloading water entrance vessel flange tapped blind hole, on vessel flange tapped blind hole, sealing function need to be played by installation screw plug.The diameter of bolt hole is configured to above-mentioned form so that nut insert can pass through top cover flange bolt through hole to realize the installation of nut insert under the operation of long handle instrument.With remove after top cover flange compared with installation screw plug, be more beneficial for reducing the irradiation suffered by operator.
Further, the described body of rod includes being provided with described second thread segment and the reduced diameter section of described 3rd thread segment, and is provided with described first thread segment and the enlarged diameter section of described 4th thread segment.
Can produce overload when stretching connecting bolt, now reduced diameter section takes the lead in surrendering, the effect injury-free to play the enlarged diameter section having protected main load effect.
Further, described nut offers spline.
This spline matches for the rotation tooth with stretching-machine, to realize automatically screwing in and screwing out of nut, improves removal efficiency of the present utility model.
Further, the incomplete thread on described first thread segment bottom and described tapped blind hole top is removed.
Remove incomplete thread, the probability that when connecting bolt is installed, thread is bruised can be reduced, to improve service life and the safety of connecting bolt.
Further, removing on the thread profile that stays of incomplete thread, at the bottom of crest and tooth between arc transition, thread profile both sides rounding off.
Use the thread profile structure of above-mentioned form, it is possible to prevent the damage of thread further.
In sum, advantage of the present utility model and having the beneficial effects that:
Connecting bolt the most of the present utility model uses four sections of helicitic textures so that it is can be connected with adapter bolt and stretching-machine such that it is able to complete the installation of connecting bolt, pretension or dismounting at shorter time, greatly reduce the operation cycle simultaneously；
2. the contact surface between nut and pad is sphere, when connecting bolt stand under load is bent, nut can produce relative slip, to offset the part flexural deformation of connecting bolt with the contact surface of pad, to reduce the bending stress of connecting bolt, improve service life and the margin of safety of connecting bolt；
3. configure the diameter of bolt hole, it is possible to effectively alleviate the connecting bolt curvature effect that top cover flange distortion causes, improve service life and the margin of safety of connecting bolt；
4. configure the diameter of bolt hole so that nut insert can pass through top cover flange bolt through hole to realize the installation of nut insert under the operation of long handle instrument, and remove after top cover flange compared with installation screw plug, be more beneficial for reducing the irradiation suffered by operator；
5. the body of rod is made up of reduced diameter section and enlarged diameter section, can produce overload when stretching connecting bolt, and reduced diameter section takes the lead in surrendering, the effect injury-free to play the enlarged diameter section having protected main load effect；
6. arranging spline on nut, this spline matches for the rotation tooth with stretching-machine, to realize automatically screwing in and screwing out of nut, improves removal efficiency of the present utility model；
7. remove incomplete thread, the probability that when connecting bolt is installed, thread is bruised can be reduced, to improve service life and the safety of connecting bolt.
Accompanying drawing explanation
In order to be illustrated more clearly that embodiment of the present utility model, the accompanying drawing used required for describing in this utility model embodiment will be briefly described below.It will be apparent that the accompanying drawing in describing below is only some embodiments described in this utility model, for a person skilled in the art, in the case of not paying creative work, it is also possible to according to figure below, obtain other accompanying drawing.
Fig. 1 is the connected mode between existing a kind of pressure vessels top cover and cylinder；
Fig. 2 is the connected mode between existing another kind of pressure vessels top cover and cylinder；
Fig. 3 is structural representation of the present utility model；
Fig. 4 is the structural representation of connecting bolt；
Fig. 5 is the structural representation of thread profile；
Wherein, the parts title that reference is corresponding is as follows:
1-top cover flange, 2-vessel flange, 3-connecting bolt, 4-nut, 5-pad, 6-cannelure, 7-cylinder side nut, 8-block, 9-kingbolt, 10-top nut, 11-pad, 12-locking nut, 13-top nut, 14-support, 15-backing plate, 16-bolt, 101-bolt hole, 201-tapped blind hole, the 301-body of rod, 302-the first thread segment, 303-the second thread segment, 304-the 3rd thread segment, 305-the 4th thread segment, 401-spline.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that this utility model, below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete description.It will be apparent that embodiment described below is only the part in this utility model embodiment rather than all.The embodiment recorded based on this utility model, other all embodiments that those skilled in the art obtain in the case of not paying creative work, all in the range of this utility model is protected.
Embodiment 1:
nullAs shown in Figure 3 and Figure 4，Reactor pressure vessel attachment structure，Including top cover flange 1、Vessel flange 2、Connecting bolt 3 and nut 4，Bolt hole 101 is offered on top cover flange 1，Tapped blind hole 201 is offered on vessel flange 2，Connecting bolt 3 runs through bolt hole 101 and tapped blind hole 201 threaded engagement，Nut 4 be connected screw thread 3 threaded engagement and top cover flange 1 be pressed on vessel flange 2，Connecting bolt 3 includes the body of rod 301，It is arranged at the first thread segment 302 of the body of rod 301 lower end，Be arranged at the body of rod 301 upper end for the second thread segment 303 being connected with adapter bolt，Arrange with between the first thread segment 302 with the second thread segment 303 for the 3rd thread segment 304 that is connected with stretching-machine discount and be arranged at the 4th thread segment 305 between the first thread segment 302 and the 3rd thread segment 304；First thread segment 302 and tapped blind hole 201 threaded engagement, the 4th thread segment 305 and nut 4 threaded engagement.
Operation principle is as follows:
Nut 4 being threaded to the 4th thread segment 305 and threadeds with the 4th thread segment 305, the second thread segment 303 is connected with adapter bolt, and the 3rd thread segment 304 is connected with the discount of stretching-machine.By stretching-machine electric rotating machine drive adapter bolt the first thread segment 302 screw in tapped blind hole 201.Starting stretching-machine, connected by stretching-machine discount and the 3rd thread segment 304, connecting bolt 3 is stretched by stretching-machine, after connecting bolt 3 is elongated, tightening nut 4, to realize pretightning force requirement when connecting bolt 3 is installed, meet and after requiring, remove stretching-machine, complete to install.Unloading process is contrary with installation process step.
Embodiment 2:
As it is shown on figure 3, the present embodiment is on the basis of embodiment 1, also including being placed on the pad 5 on described connecting bolt 3 and between described top cover flange 1 and described nut 4, the contact surface between described nut 4 and pad 5 is sphere.
Contact surface between nut 4 and pad 5 is sphere, when connecting bolt 3 stand under load is bent, nut 4 can produce relative slip with the contact surface of pad 5, to offset the part flexural deformation of connecting bolt 3, to reduce the bending stress of connecting bolt 3, improve service life and the margin of safety of connecting bolt 3.
Embodiment 3:
As shown in Figure 3, the present embodiment is on the basis of any one embodiment above-mentioned, and the gap that the diameter of described bolt hole 101 is configured so that between described bolt hole 101 and the described body of rod 301 can accommodate the body of rod 301 flexural deformation in described bolt hole 101.
The diameter of bolt hole 101 is configured to above-mentioned form, it is possible to effectively alleviate top cover flange 1 and deform connecting bolt 3 curvature effect caused, improves service life and the margin of safety of connecting bolt 3.
The diameter of bolt hole 101 to be configured, first the duty of top cover flange 1 is simulated, calculating the deflection of top cover flange 1, then according to the deflection of the Deformation calculation body of rod 301 of top cover flange 1, then the deflection according to the body of rod 301 configures the diameter of bolt hole 101.
Embodiment 4:
As it is shown on figure 3, the present embodiment is on the basis of any one embodiment above-mentioned, the diameter of described bolt hole 101 is configured so that the nut insert blocking described tapped blind hole 201 can pass through.
Produce corrosion for preventing from reloading water to enter the tapped blind hole 201 of vessel flange 2, on the tapped blind hole 201 of vessel flange 2, sealing function need to be played by installation screw plug.The diameter of bolt hole 101 is configured to above-mentioned form so that nut insert can pass through the bolt hole 101 of top cover flange 1 to realize the installation of nut insert under the operation of long handle instrument.With remove after top cover flange 1 compared with installation screw plug, be more beneficial for reducing the irradiation suffered by operator.
It should be noted that the function of the present embodiment and embodiment 3 can and be deposited, it is only necessary in determining the present embodiment and embodiment 3 respectively after the diameter of bolt hole 101, select a bigger diameter processing bolt through hole 101.
Embodiment 5:
As shown in Figure 4, the present embodiment is on the basis of any one embodiment above-mentioned, the described body of rod 301 includes being provided with described second thread segment 303 and the reduced diameter section of described 3rd thread segment 304, and is provided with described first thread segment 302 and the enlarged diameter section of described 4th thread segment 305.
Can produce overload when stretching connecting bolt 3, now reduced diameter section takes the lead in surrendering, the effect injury-free to play the enlarged diameter section having protected main load effect.
Embodiment 6:
As it is shown on figure 3, the present embodiment is on the basis of any one embodiment above-mentioned, described nut 4 offers spline 401.
This spline 401 matches for the rotation tooth with stretching-machine, to realize automatically screwing in and screwing out of nut 4, improves removal efficiency of the present utility model.
Embodiment 7:
As it is shown in figure 5, the present embodiment is on the basis of any one embodiment above-mentioned, the incomplete thread on described first thread segment 302 bottom and described tapped blind hole 201 top is removed.
Remove incomplete thread, the probability that when connecting bolt 3 is installed, thread is bruised can be reduced, to improve service life and the safety of connecting bolt 3.
Embodiment 8:
As it is shown in figure 5, the present embodiment is on the basis of any one embodiment above-mentioned, removing on the thread profile that stays of incomplete thread, at the bottom of crest and tooth between arc transition, thread profile both sides rounding off.
Use the thread profile structure of above-mentioned form, it is possible to prevent the damage of thread further.
As it has been described above, just can preferably realize this utility model.
Claims (8)
1. reactor pressure vessel attachment structure, including top cover flange (1), vessel flange (2), connecting bolt (3) and nut (4), bolt hole (101) is offered on top cover flange (1), tapped blind hole (201) is offered on vessel flange (2), connecting bolt (3) runs through bolt hole (101) and tapped blind hole (201) threaded engagement, top cover flange (1) is also pressed on vessel flange (2) by the threaded engagement of nut (4) and connecting bolt (3), it is characterised in that:
Connecting bolt (3) includes the body of rod (301), it is arranged at first thread segment (302) of the body of rod (301) lower end, be arranged at the body of rod (301) upper end for the second thread segment (303) of being connected with adapter bolt, arrange and the 3rd thread segment (304) being used for being connected with stretching-machine discount between the first thread segment (302) with the second thread segment (303) and be arranged at the 4th thread segment (305) between the first thread segment (302) and the 3rd thread segment (304)；
First thread segment (302) and tapped blind hole (201) threaded engagement, the 4th thread segment (305) and nut (4) threaded engagement.
Reactor pressure vessel attachment structure the most according to claim 1, it is characterised in that:
Also including being placed on the pad (5) that described connecting bolt (3) is upper and is positioned between described top cover flange (1) and described nut (4), the contact surface between described nut (4) and pad (5) is sphere.
Reactor pressure vessel attachment structure the most according to claim 1, it is characterised in that:
The gap that the diameter of described bolt hole (101) is configured so that between described bolt hole (101) and the described body of rod (301) can accommodate the body of rod (301) flexural deformation in described bolt hole (101).
Reactor pressure vessel attachment structure the most according to claim 1, it is characterised in that:
The diameter of described bolt hole (101) is configured so that the nut insert blocking described tapped blind hole (201) can pass through.
Reactor pressure vessel attachment structure the most according to claim 1, it is characterised in that:
The described body of rod (301) includes being provided with described second thread segment (303) and the reduced diameter section of described 3rd thread segment (304), and is provided with described first thread segment (302) and the enlarged diameter section of described 4th thread segment (305).
Reactor pressure vessel attachment structure the most according to claim 1, it is characterised in that:
Spline (401) is offered on described nut (4).
7. according to the reactor pressure vessel attachment structure described in any one in claim 1 ~ 6, it is characterised in that:
The incomplete thread on described first thread segment (302) bottom and described tapped blind hole (201) top is removed.
Reactor pressure vessel attachment structure the most according to claim 7, it is characterised in that:
Removing on the thread profile that stays of incomplete thread, at the bottom of crest and tooth between arc transition, thread profile both sides rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620372708.4U CN205609227U (en) | 2016-04-28 | 2016-04-28 | Reactor pressure vessel connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620372708.4U CN205609227U (en) | 2016-04-28 | 2016-04-28 | Reactor pressure vessel connection structure |
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| Publication Number | Publication Date |
|---|---|
| CN205609227U true CN205609227U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620372708.4U Active CN205609227U (en) | 2016-04-28 | 2016-04-28 | Reactor pressure vessel connection structure |
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| CN (1) | CN205609227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735062A (en) * | 2017-04-14 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump kingbolt stretching simulator |
-
2016
- 2016-04-28 CN CN201620372708.4U patent/CN205609227U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735062A (en) * | 2017-04-14 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump kingbolt stretching simulator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |