CN104575629B - A kind of attachment structure of removable upper base and guide pipe - Google Patents
A kind of attachment structure of removable upper base and guide pipe Download PDFInfo
- Publication number
- CN104575629B CN104575629B CN201410738096.1A CN201410738096A CN104575629B CN 104575629 B CN104575629 B CN 104575629B CN 201410738096 A CN201410738096 A CN 201410738096A CN 104575629 B CN104575629 B CN 104575629B
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- Prior art keywords
- elastomeric joint
- guide pipe
- attachment structure
- pore
- base
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
- G21C3/332—Supports for spacer grids
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The present invention provides the attachment structure of a kind of removable upper base and guide pipe, including upper base, sets be oriented to pore thereon, is oriented to the internal diameter of the internal diameter more than bottom on pore top, forms cascaded surface；Elastomeric joint, is tubular structure, and elastomeric joint top includes at least two Elastic buckles, the circumferentially arranged groove in inner side of Elastic buckle, the lower end of elastomeric joint sets boss, and the lower surface for the guiding pore with upper base coordinates, the upward motion of limitation elastomeric joint；Clamping tube, is tubular structure, and the circumferentially arranged projection of clamping tube upper outside, projection is used to be embedded in the groove of Elastic buckle, and clamping tube is used to be locked in Elastic buckle the cascaded surface for being oriented to pore, the downward motion of limitation elastomeric joint.Upper base of the invention and the attachment structure of guide pipe, take instrument and take out clamping tube using hook, after elastomeric joint loses support, elastomeric joint press-in are oriented in pore, you can base in taking-up, realize the repetition installing/dismounting of the attachment structure.
Description
Technical field
The present invention relates to the attachment structure design field of pressurized-water reactor fuel assembly, and in particular to it is a kind of it is new can
Tear the attachment structure of base and guide pipe in formula open.
Background technology
Pressurized-water reactor core is typically arranged in order by many fuel assemblies and constituted, and pressurized-water reactor fuel assembly is usual
It is made up of some fuel rods, guiding duct member, instrument duct member, screen work, upper bottom nozzle etc..
Screen work is generally divided into top braces screen work, intermediate supports screen work and bottom support grid, the clamping of these support grids
The fuel rod being inserted, plays a part of support.Top braces screen work, intermediate supports screen work and bottom support grid pass through machine
Tool connected mode or welding manner are connected with duct member is oriented to.Connected the weight transmitting of fuel rod to being oriented to pipe portion by these
Part, being oriented to duct member will bear axial load.It is oriented to duct member to be connected with upper bottom nozzle by way of machinery or welding, equally
Load of the transmission from upper bottom nozzle.Therefore connection for guide pipe and upper base is, it is necessary to have certain load of bearing
Ability.
Parts constitute fuel assembly by above-mentioned connection, into reactor core operation.In the process of running, it may occur that fuel rod
Situation that is damaged or damaging.Now need refuelling rod.Need to remove upper base from component during refuelling rod, therefore need
Release the connection of base and guide pipe.For weld connected mode, to destroy weld pads can just untie base with
The connection of guide pipe.But destruction solder joint often cause base or guide pipe damage even damage, cause base and
Guide pipe cannot be reused.This will cause bigger loss to fuel assembly.
Equally there are the attachment structure of removable upper base and guide pipe, such as Mitsubishi heavy industry strain formula in the world at present
The patent CN200880017064.5 of commercial firm's application《The attachment structure of fuel assembly》.Removable being connected by of patent proposition
The structure of threaded connection.However, threaded connection difficulty of processing is big, installing/dismounting is difficult.
Those skilled in the art are devoted to providing the attachment structure of a kind of removable upper base and guide pipe, and processing is simple,
And it is easily installed dismounting.
The content of the invention
For problems of the prior art, it is an object of the present invention to provide the removable upper base of one kind with lead
To the attachment structure of pipe, there is the attachment structure enough intensity to bear the load of base transmission, while can repeat to install
Dismounting, upper base is removed without destruction base and guide pipe from fuel assembly.
In order to solve the above problems, the present invention provides the attachment structure of a kind of removable upper base and guide pipe, using one
Kind of elastomeric joint is in clamping connection structure, elastomeric joint is hooked and is stuck in upper base upper grid plate and is oriented in pore on cascaded surface, and with supportting
Tight pipe support elastomeric joint plays locking effect, so as to limit the downward motion of elastomeric joint, bears the upward load of fuel assembly
Lotus；Meanwhile, elastomeric joint lower end is coordinated using raised with upper base upper grid plate lower surface directly contact, and limitation jointing is upward
Motion, bear the downward load of fuel assembly.
The attachment structure links together upper base with guide pipe by way of mechanically connecting, and usable hook takes instrument
Clamping tube is taken out, after elastomeric joint loses support, elastomeric joint press-in is oriented in pore, you can base in taking-up, realized
The repetition installing/dismounting of the attachment structure.
The present invention provides the attachment structure of a kind of upper base and guide pipe, including：
Upper base, sets be oriented to pore thereon, is oriented to the internal diameter of the internal diameter more than bottom on pore top, forms cascaded surface；
Elastomeric joint, is tubular structure, and elastomeric joint top includes at least two Elastic buckles, has between Elastic buckle
Spacing, the circumferentially arranged groove in inner side of Elastic buckle, the lower end of elastomeric joint sets boss, for the guide pipe with upper base
The lower surface in hole coordinates, and the upward motion of limitation elastomeric joint, boss lower end sets guide pipe connection end, is oriented to for connecting
Pipe；
Clamping tube, is tubular structure, and the circumferentially arranged projection of clamping tube upper outside, projection is used to be embedded in Elastic buckle
Groove, clamping tube is used to be locked in Elastic buckle the cascaded surface for being oriented to pore, the downward motion of limitation elastomeric joint.
Groove, groove and the male cooperation of clamping tube are set in Elastic buckle, the elastomeric joint tubulose of Elastic buckle is limited
Structure prevents elastomeric joint from being come off from guiding pore to contract, while also functioning to support elastomeric joint improves bonding strength
Effect.
The attachment structure of upper base of the invention and guide pipe, usable hook takes instrument and takes out clamping tube, elastomeric joint
After losing support, elastomeric joint press-in is oriented in pore, you can base in taking-up, realizes that the repetition of the attachment structure is installed and tear open
Unload.
Further, the projection of clamping tube is annular or segmental structure or point-like projection, and the projection of clamping tube can be
Whole loop configuration, or the segmental structure including circumferentially distributed multiple projection.
Further, the top chamfering of Elastic buckle, is easy to elastomeric joint to insert and is oriented to pore, makes installation more square
Just.
Further, the lower surface of Elastic buckle is plane.
Further, the lower surface of Elastic buckle is to include circular arc, ladder along the profile of the cross section of elastomeric joint radial direction
Face includes circular arc along the profile of the cross section of the radial direction for being oriented to pore, and the lower surface with Elastic buckle coordinates.
Using said structure, no longer need corresponding tool that Elastic buckle press-in is oriented in pore in unloading process.
After clamping tube is extracted, upper base need to only be pulled up, due to the contact surface of circular arc, Elastic buckle is subject to guide
Can be automatic toward contract to the pressure in pore, so that upper base is easier with the disassembling section of the attachment structure of guide pipe.
Further, upper base also includes holddown spring with the attachment structure of guide pipe, and the lower end for being oriented to pore sets heavy
Hole, holddown spring is sheathed on elastomeric joint, and lower end is connected with the boss of elastomeric joint, and upper end contacts with the cascaded surface of counterbore.
Prevent the upper base caused due to dimensional accuracy from rocking using holddown spring, make the connection knot of base and guide pipe
The connection of structure is more firm.
Further, spring washer is set between holddown spring and the cascaded surface of counterbore.
Further, the upper end for being oriented to pore, the Elastic buckle of elastomeric joint and clamping tube three forms chamfering, makes this
Attachment structure has guide effect to the associated component being inserted, it is easy to which installing/dismounting is operated.
Further, the angle of chamfering is 0~45 °.
Compared with prior art, upper base of the invention has the advantages that with the attachment structure of guide pipe：
(1) Elastic buckle inside sets groove, groove and the male cooperation of clamping tube, limits Elastic buckle to elastomeric joint
Tubular structure internal contraction, prevents elastomeric joint from being come off from guiding pore, while also functioning to support elastomeric joint improves connection
The effect of intensity, takes instrument and takes out clamping tube using hook, after elastomeric joint loses support, elastomeric joint press-in is oriented into pore
It is interior, you can base in taking-up, realize the repetition installing/dismounting of the attachment structure；
(2) lower surface of Elastic buckle uses the contact surface of circular arc with guiding pore cascaded surface, in unloading process not
Elastic buckle internal pressure instrument is needed again so that upper base is easier with the disassembling section of the attachment structure of guide pipe；
(3) holddown spring is sheathed on elastomeric joint, is arranged between base and the boss of elastomeric joint, improves connection knot
The bonding strength of structure, prevents the upper base caused due to dimensional accuracy from rocking using holddown spring；
(4) upper end for being oriented to pore, the Elastic buckle of elastomeric joint and clamping tube forms chamfering, makes the attachment structure pair
The associated component being inserted has guide effect, it is easy to which installing/dismounting is operated.
Brief description of the drawings
Fig. 1 is the schematic diagram of the upper base with the attachment structure of guide pipe of one embodiment of the present of invention；
Fig. 2 is the sectional view of the upper base shown in Fig. 1 and the upper base of the attachment structure of guide pipe；
Fig. 3 is the top view of the upper base shown in Fig. 1 and the elastomeric joint of the attachment structure of guide pipe；
Fig. 4 is sectional view of the elastomeric joint shown in Fig. 3 along A-A directions；
Fig. 5 is the perspective view of the upper base shown in Fig. 1 and the clamping tube of the attachment structure of guide pipe；
Fig. 6 is the schematic diagram of the upper base with the attachment structure of guide pipe of an alternative embodiment of the invention；
Fig. 7 is the schematic diagram of the upper base with the attachment structure of guide pipe of another embodiment of the invention；
Fig. 8 is the schematic diagram of the upper base with the attachment structure of guide pipe of another embodiment of the invention.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is only limitted to this.
As shown in figure 1, the attachment structure of the upper base of one embodiment of the present of invention and guide pipe, including upper base 1, bullet
Property joint 2 and clamping tube 3；
As shown in Fig. 2 set on upper base 1 being oriented to pore, the internal diameter of the internal diameter more than bottom on pore top is oriented to, is formed
Cascaded surface 11；
As shown in Figure 3, Figure 4, elastomeric joint 2 is tubular structure, and elastomeric joint top includes at least two Elastic buckles 21,
The top of elastomeric joint is processed as petal-shaped in the present embodiment, comprising 5 Elastic buckles 21.
The top of Elastic buckle 21 processes 15~30 ° of chamferings, and the chamfering on the top of Elastic buckle 21 is in the present embodiment
30 °, it is easy to elastomeric joint 2 to insert and is oriented to pore, makes easier for installation.
The circumferentially arranged groove 211 in inner side of Elastic buckle 21.
The lower surface 212 of Elastic buckle 21 is plane.
The lower end of elastomeric joint 2 sets boss 22, and the lower surface for the guiding pore with upper base 1 coordinates, and limits bullet
The property upward motion of joint 2.
Boss 22 is annular boss, or other shapes, as long as can be with the lower surface of the guiding pore of upper base 1
Coordinate, the upward motion of limitation elastomeric joint 2.
The height of boss 22 is 2~5mm.
As shown in figure 5, clamping tube 3 is tubular structure, the upper outside circumferentially arranged raised 31 of clamping tube 3, raised 31
Groove 211 for being embedded in Elastic buckle 21, clamping tube 3 is used to be locked in Elastic buckle 21 cascaded surface 11 for being oriented to pore,
The downward motion of limitation elastomeric joint 2.
Groove 211 is set in Elastic buckle 21, and groove 211 coordinates with raised the 31 of clamping tube 3, limitation Elastic buckle 21 to
The tubular structure internal contraction of elastomeric joint 2, prevents elastomeric joint 2 from being come off from guiding pore, while also functioning to support elastic connecting
First 2 effects for improving bonding strength.
The attachment structure of upper base and guide pipe in the present embodiment, usable hook takes instrument and takes out clamping tube 3, elasticity
After joint 2 loses support, elastomeric joint 2 is pressed into guiding pore, you can base 1 in taking-up, realizes the weight of the attachment structure
Multiple installing/dismounting.
Raised the 31 of clamping tube 3 can also be segmental structure or dots structure, i.e., including circumferentially distributed multiple projection
31 structure.
As shown in fig. 6, the attachment structure of the upper base of an alternative embodiment of the invention and guide pipe, also including compressing bullet
Spring 4, the lower end for being oriented to pore sets counterbore, and holddown spring 4 is sheathed on elastomeric joint 2, and lower end connects with the boss 22 of elastomeric joint 2
Connect, upper end contacts with the cascaded surface 12 of counterbore.
Spring washer 5 is set between the cascaded surface 12 of holddown spring 4 and counterbore.
Prevent the upper base caused due to dimensional accuracy from rocking using holddown spring, make the connection knot of base and guide pipe
The connection of structure is more firm.
For part slides during preventing installation or removal, holddown spring 4 welds with spring washer 5, elastomeric joint 2 it is convex
The inner side of platform 22 sets spring boss 221, and holddown spring 4 is welded with spring boss 221.
After elastomeric joint 2 and holddown spring 5 and spring washer 5 are assembled, insertion is oriented in pore, Elastic buckle 21 with lead
Coordinate the downward motion of limitation elastomeric joint 2 to the cascaded surface 11 in pore, and bear load axially upwards；Boss 22 with lead
To the lower surface of pore coordinate limitation elastomeric joint 2 to upper motion, and bear load axially downwardly.Now, holddown spring 4
Compressed, prevent elastomeric joint 2 from being rocked in pore is oriented to due to gap, do not played carrying；Clamping tube 3 is inserted into elasticity
In joint 2, raised 31 coordinate with groove 211, and limitation Elastic buckle 21 is played a supporting role to guiding pore contract.
In dismounting, instrument is taken by hook first clamping tube 3 is taken out from elastomeric joint 2；After taking out clamping tube 3, bullet
Property joint 2 Elastic buckle 21 can be oriented to pore in shrink.The Elastic buckle 21 of elastomeric joint 2 is pressed by internal pressure instrument
Enter to be oriented in pore, the limitation that base is moved upwards in releasing, so as to remove upper base.Holddown spring 4 is welded with spring boss 221
Connect, will not be come off because of the upper base of dismounting.
As shown in fig. 7, in the attachment structure of the upper base of another embodiment of the invention and guide pipe, Elastic buckle 21
Lower surface be along the cross section of the radial direction of elastomeric joint 2 profile include circular arc, cascaded surface 11 along be oriented to pore radial direction horizontal stroke
The profile in section includes circular arc, and the lower surface with Elastic buckle 21 coordinates.
Using said structure, no longer need corresponding tool that Elastic buckle 21 is pressed into guiding pore in unloading process.
After clamping tube 3 is extracted, upper base 1 need to only be pulled up, due to the contact surface of circular arc, Elastic buckle 21 is subject to
Can be automatic toward contract to the pressure being oriented in pore, so that upper base more holds with the disassembling section of the attachment structure of guide pipe
Easily.
As shown in figure 8, in the attachment structure of the upper base of another embodiment of the invention and guide pipe, guiding pore,
The upper end of the Elastic buckle 21 of elastomeric joint 2 and the three of clamping tube 3 forms chamfering, makes the attachment structure to the phase that is inserted
Closing component has guide effect, it is easy to which installing/dismounting is operated.
The angle of chamfering is 0~45 °, and chamfering is 45 ° in the present embodiment.
Upper base of the invention and the attachment structure of guide pipe, set groove, groove and clamping tube inside Elastic buckle
Male cooperation, limitation Elastic buckle prevents elastomeric joint from being come off from guiding pore to elastomeric joint tubular structure internal contraction,
The effect for supporting elastomeric joint to improve bonding strength is also functioned to simultaneously, clamping tube is taken out using corresponding tool, and elastomeric joint loses
After going support, elastomeric joint press-in is oriented in pore, you can base in taking-up, realizes that the repetition of the attachment structure is installed and tear open
Unload；The lower surface of Elastic buckle uses the contact surface of circular arc with pore cascaded surface is oriented to, and phase is no longer needed in unloading process
Answer instrument so that upper base is easier with the disassembling section of the attachment structure of guide pipe；Holddown spring is sheathed on elastomeric joint, if
It is placed between base and the boss of elastomeric joint, improves the bonding strength of attachment structure, is prevented due to chi using holddown spring
The upper base that very little precision is caused is rocked；The upper end for being oriented to pore, the Elastic buckle of elastomeric joint and clamping tube forms chamfering, makes
The attachment structure has guide effect to the associated component being inserted, it is easy to which installing/dismounting is operated.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations with design of the invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of attachment structure of upper base and guide pipe, it is characterised in that the attachment structure bag of the upper base and guide pipe
Include：
Upper base, sets be oriented to pore thereon, the internal diameter of the internal diameter more than bottom on the guiding pore top, forms cascaded surface；
Elastomeric joint, is tubular structure, and the elastomeric joint top includes at least two Elastic buckles, between the Elastic buckle
With spacing, the circumferentially arranged groove in inner side of the Elastic buckle, the lower end of the elastomeric joint sets boss, for institute
The lower surface for stating the guiding pore of base coordinates, and limits the upward motion of the elastomeric joint, and the boss lower end sets and leads
To pipe connection end, for connecting guide pipe；
Clamping tube, is tubular structure, the circumferentially arranged projection of clamping tube upper outside, described raised for being embedded in the bullet
Property buckle the groove, the clamping tube be used for by the Elastic buckle be locked in it is described guiding pore the cascaded surface,
Limit the downward motion of the elastomeric joint；
The described raised of the clamping tube is that annular or segmental structure or point-like are raised, the connection knot of the upper base and guide pipe
Structure also includes holddown spring, and the lower end of the guiding pore sets counterbore, and the holddown spring is sheathed on elastomeric joint, lower end with
The boss connection of the elastomeric joint, upper end contacts with the cascaded surface of the counterbore.
2. the attachment structure of base and guide pipe is gone up as claimed in claim 1, it is characterised in that the top of the Elastic buckle
Chamfering.
3. the attachment structure of base and guide pipe is gone up as claimed in claim 1, it is characterised in that the lower end of the Elastic buckle
Face is plane.
4. the attachment structure of base and guide pipe is gone up as claimed in claim 1, it is characterised in that the lower end of the Elastic buckle
Face is to include circular arc along the profile of the cross section of elastomeric joint radial direction, and cascaded surface edge is oriented to the profile of the cross section of the radial direction of pore
Including circular arc, the lower surface with Elastic buckle coordinates.
5. the attachment structure of base as claimed in claim 1 upper and guide pipe, it is characterised in that the holddown spring with it is described
Spring washer is set between the cascaded surface of counterbore.
6. the attachment structure of base as claimed in claim 1 upper and guide pipe, it is characterised in that the guiding pore, described
The upper end of the Elastic buckle of elastomeric joint and the clamping tube three forms chamfering.
7. the attachment structure of base and guide pipe is gone up as claimed in claim 6, it is characterised in that the angle of the chamfering is 0
~45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738096.1A CN104575629B (en) | 2014-12-05 | 2014-12-05 | A kind of attachment structure of removable upper base and guide pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738096.1A CN104575629B (en) | 2014-12-05 | 2014-12-05 | A kind of attachment structure of removable upper base and guide pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104575629A CN104575629A (en) | 2015-04-29 |
| CN104575629B true CN104575629B (en) | 2017-05-31 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410738096.1A Active CN104575629B (en) | 2014-12-05 | 2014-12-05 | A kind of attachment structure of removable upper base and guide pipe |
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| CN (1) | CN104575629B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068208A (en) * | 2017-02-27 | 2017-08-18 | 中国核动力研究设计院 | Portion connecting structure and its mounting and dismounting method on a kind of quick removable fuel assembly |
| CN107644687A (en) * | 2017-08-16 | 2018-01-30 | 岭东核电有限公司 | Guide pipe and the quick releasable connection structure of upper base and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068208A (en) * | 2017-02-27 | 2017-08-18 | 中国核动力研究设计院 | Portion connecting structure and its mounting and dismounting method on a kind of quick removable fuel assembly |
| CN107644687A (en) * | 2017-08-16 | 2018-01-30 | 岭东核电有限公司 | Guide pipe and the quick releasable connection structure of upper base and method |
| CN107644687B (en) * | 2017-08-16 | 2019-11-15 | 岭东核电有限公司 | Guide pipe and the quick releasable connection structure of upper tube socket and method |
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|---|---|
| CN104575629A (en) | 2015-04-29 |
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