CN205751535U - Fuel rod loads the protection device of fuel assembly - Google Patents
Fuel rod loads the protection device of fuel assembly Download PDFInfo
- Publication number
- CN205751535U CN205751535U CN201620383874.4U CN201620383874U CN205751535U CN 205751535 U CN205751535 U CN 205751535U CN 201620383874 U CN201620383874 U CN 201620383874U CN 205751535 U CN205751535 U CN 205751535U
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- Prior art keywords
- lattice cell
- band
- fuel rod
- protection device
- fuel
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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 kind of fuel rod and load the protection device of fuel assembly, for lattice cell screen work, lattice cell screen work includes multiple lattice cell being separated to form by band；Fuel rod loads protection device and includes that at least one is held on the band of adjacent two lattice cell and oppresses lattice cell inner spring and removes the chuck preloaded；Chuck includes the interval two jig arm relatively and in being respectively protruding into two lattice cells；Interval between two jig arm is less than the maximum spacing of two adjacent lattice cell inner springs, or the maximum spacing less than lattice cell inner spring with its place band.In this utility model, before fuel rod loads lattice cell screen work, by on its grips band between lattice cell, compressing lattice cell inner spring removes and preloads, eliminate chucking power, fuel rod is not swiped by spring clamping when drawing in, solves involucrum scratch problem when fuel rod is drawn in fuel assembly assembling.
Description
Technical field
This utility model relates to nuclear reactor technology field, particularly relates to a kind of fuel rod and loads fuel assembly
Protection device.
Background technology
The fuel assembly used in nuclear power plant is made up of skeleton and fuel rod two parts.Skeleton by base, lead
The parts compositions such as Xiang Guan, grid spacer and connector；Fuel rod is by fuel rod clad pipe and the core of inside
Block, spring etc. form, and two ends are by end plug welded seal.Fuel rod relies on by the bullet in locating grid cell
Spring positions with the grasping system just convexed into.Common grid spacer uses 6 supporting way to press from both sides
Hold location fuel rod, i.e. fuel rod firm convex and one by two in each direction of each lattice cell of every layer of screen work
Individual spring clamps.Therefore, after fuel rod loads, spring can produce certain deformation, it is provided that gives combustion
Charge bar chucking power.
Adding man-hour, first completing the manufacture of fuel assembly skeleton, then skeleton is fixed on pull-rod platform,
Fuel rod is drawn in skeleton.During drawing in due to fuel rod, fuel rod clad needs to be pressed from both sides by spring
Holding force, fuel rod surface can inevitably and the spring of grid spacer the most convex between rub, friction
Fuel rod surface can be made: 1, form cut；2, zirconium bits buildup is produced；3, thread zirconium bits can be in lattice cell
It is detained.It is disadvantageous that the runnability of fuel rod is affected by cut and zirconium bits, increases involucrum in running and breaks
Damage risk.
For problems such as pull-rod scrapings, currently used processing method has:
1, do not process；
2, the friction during using the lubricants such as water to reduce pull-rod；
3, special process is utilized to reduce friction at involucrum plated surface coating material；
4, use special device to be produced by spring before pull-rod to deform in advance, make the bullet during pull-rod
Spring is without preloading.
Wherein, use water to be lubricated and cannot fundamentally solve scraping problem.And use special device to exist
Being produced in the method deformed in advance by spring before pull-rod, screen work band need to leave the window ammunition feed of particular design
Spring compressor inserts, and screen work is required height, is not suitable for the screen work of big guide pipe lattice cell design.
Utility model content
The technical problems to be solved in the utility model is, it is provided that one avoids fuel rod to send out when loading screen work
The fuel rod of raw scratch loads the protection device of fuel assembly.
This utility model solves its technical problem and be the technical scheme is that a kind of fuel rod of offer loads
The protection device of fuel assembly, for lattice cell screen work, described lattice cell screen work includes multiple being separated by band
The lattice cell formed；Described fuel rod loads protection device and includes that at least one is held on described in adjacent two
On the band of lattice cell and oppress described lattice cell inner spring and remove the chuck preloaded；
Described chuck includes the interval two jig arm relatively and in being respectively protruding into two described lattice cells；Two
Interval between individual described jig arm is less than the maximum spacing of two adjacent described lattice cell inner springs, or is less than
Described lattice cell inner spring and the maximum spacing of its place band.
Preferably, the end, one end of described jig arm be provided with described spring contact, guide described jig arm along described
The guide part of spring surface relative movement.
Preferably, described guide part is bevelling or rounding.
Preferably, described chuck also includes the connecting portion being connected between two described jig arm one end.
Preferably, described jig arm and connecting portion are structure as a whole.
Preferably, the protection device of this fuel rod loading fuel assembly also includes that at least one coordinates described
The connection band of lattice cell screen work side, described chuck is connected to described connection on band towards described lattice cell screen work.
Preferably, described connection is additionally provided with the bending section for walking around guide pipe on band.
Preferably, described connection band includes that at least one first connects band and at least one second connection band,
Described first connects band connects the lattice cell on the corresponding described lattice cell screen work of band in being crisscross arranged with second.
The beneficial effects of the utility model: before fuel rod loads lattice cell screen work, fuel rod loads protection dress
Putting by grips band between lattice cell, compressing lattice cell inner spring removes and preloads, and eliminates folder
Holding force so that do not swiped by spring clamping when fuel rod is drawn in, solves fuel rod in fuel assembly assembling
Involucrum scratch problem when drawing in.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is that the fuel rod of this utility model one embodiment loads the protection device cooperation of fuel assembly at grid
Structural representation on unit's screen work；
Fig. 2 is that fuel rod shown in Fig. 1 loads the structural representation of chuck in the protection device of fuel assembly；
Fig. 3 be fuel rod shown in Fig. 1 load fuel assembly protection device in chuck connect band on knot
Structure schematic diagram.
Detailed description of the invention
In order to technical characteristic of the present utility model, purpose and effect are more clearly understood from, existing comparison
Accompanying drawing describes detailed description of the invention of the present utility model in detail.
As it is shown in figure 1, the fuel rod of this utility model one embodiment loads the protection device of fuel assembly,
To fuel rod load fuel stringer assembly protect, for lattice cell screen work, lattice cell screen work include multiple by
The lattice cell 2 that band 1 is separated to form.This fuel rod loads protection device and includes at least one chuck 10, uses
On the band 1 being held on adjacent two lattice cell 2, and oppress lattice cell 2 inner spring 3 and remove and preload,
When lattice cell 2 drawn in by fuel rod 4, fuel rod 4 will not be produced chucking power, it is to avoid scratch fuel rod 4
Involucrum.
Wherein, in conjunction with Fig. 1,2, chuck 10 includes that interval is relatively and in being respectively protruding into two lattice cells 2
Two jig arm 11；Spring 3 is positioned on the band 1 of lattice cell 2, by jig arm during jig arm 11 stretches into
The compressing of 11 deforms and removes and preload.
The material that chuck 10 uses rigidity strong is made, and elastic deformation will not occur in clamping process.Additionally,
Jig arm 11 is flake structure, and thickness is little, does not affect drawing in of subsequent combustion rod 4 time in lattice cell 2.
Generally, on four internal faces of each lattice cell 2, often relative to two internal faces be respectively equipped with bullet
Spring 3 and firm male structure, spring 3 is relative with firm male structure；Spring 3 is protruding to lattice cell 2 center position
Elastic piece structure.In some lattice cells 2, the spring 3 in a lattice cell 2 and the bullet of adjacent lattice cell 2
Spring 3 is positioned on same band 1, and two springs 3 are an overall double-spring structure.For this kind of feelings
Condition, when chuck 10 clamps on band 1, two jig arm 11 of chuck 10 are oppressed in two lattice cells 2 simultaneously
Spring 3, such as Fig. 1, as shown in 2.Wherein, the interval between two jig arm 11 is less than adjacent two
The maximum spacing of lattice cell 2 inner spring 3.
In other lattice cells 2, spring 3 in a lattice cell 2 and the spring 3 of adjacent lattice cell 2 are not
Being positioned on same band 1, the spring 3 in lattice cell 2 is single spring structure.To planting situation, chuck 10
Two jig arm 11 between interval less than lattice cell 2 inner spring 3 and the maximum spacing of its place band 1,
So that can pressuring spring 3 when chuck 10 is clamped on band 1.
So that jig arm 11 more preferably stretches into lattice cell 2 pressuring spring 3, the one of jig arm 11 along spring 3
End end is provided with guide part 13.Guide part 13 contacts with spring 3, guides jig arm 11 along spring 3 surface
Relative movement.
Preferably, guide part 13 can be bevelling or rounding, with inclined plane or fillet convex surface contact spring
3。
Further, chuck 10 also includes the connecting portion 12 being connected between two jig arm 11 one end.Lead
On the end that portion 13 is positioned in jig arm 11 away from connecting portion 12.
Preferably, jig arm 11 and connecting portion 12 are structure as a whole, and can be bent by the strip piece that a rigidity is strong
Formed, overall U-shaped.
Further, as shown in Figure 1,3, the protection device of this fuel rod loading fuel assembly may also include
At least connection band 20 coordinated in lattice cell screen work side, chuck 10 is connected to connect towards lattice cell screen work
On band 20.Connect band 20 can be linked together by multiple chucks 10, conveniently chuck 10 is clamped simultaneously
On multipair adjacent lattice cell 2.
Connect with 20 for rigid material make list structure.
It is additionally provided with bending section 21 on band 20, for walking around the guide pipe 5 on lattice cell screen work it addition, connect.
The radian of bending section 21 can be arranged according to the surface radian of guide pipe 5.
As a selectivity embodiment, fuel rod loads the protection device of fuel assembly and includes multiple phase
To independent connection band 20, each connection is respectively connected with multiple chuck 10 on band 20.Multiple chucks 10 are right
Answer spring 3 spacing of multiple lattice cells 2 on lattice cell screen work and spaced apart.By connecting band 20 and multiple folders
Multiple chucks 10 can be clamped on band 1 by the setting of 10 simultaneously, and that oppresses with in a line is multiple
The spring 3 of lattice cell 2, improves fuel rod efficiency of assembling.
Alternatively property embodiment, connect band 20 can include at least one first connect band and
At least one second connects band, and the first connection carries to connect with second and is respectively connected with multiple chuck 10 on band.The
One connect band and second connect band can the lattice cell 2 of corresponding lattice cell screen work list in being crisscross arranged.This first connection
Band and second connects band and is preferably cross-linked with detachable engaging, and after the assembling of convenient fuel rod, split departs from grid
Unit's screen work.
The protection device using above-mentioned fuel rod to load fuel assembly carries out the assembling of fuel rod, with reference to figure
1-3, fuel rod loads the method for fuel assembly and can comprise the following steps that
On S1, the band 1 chuck 10 being held between two lattice cells 2 adjacent on lattice cell screen work, folder
Two jig arm 11 of 10 are respectively protruding in two lattice cells 2, the spring 3 in compressing lattice cell 2, make spring
3 deformation are removed and are preloaded；
In step S1, the end, one end of jig arm 11 is contacted with spring 3 by guide part 13, and in jig arm
11 stretch into lattice cell 2 during move along spring 3 surface, pressure make spring 3 deform.Guide part 13 is oblique
Angle or rounding, can relative sliding contact with spring 3 surface.
Further, described chuck 10 is connected to connect on band 20；Connecting band 20 can be by multiple chuck
10 link together, and are conveniently held on multipair adjacent lattice cell 2 by chuck 10 simultaneously.Connect band 20
For rigid material make list structure.
In this step S1, by connection band 20 cooperation in lattice cell screen work side, by corresponding for chuck 10 lattice cell 2
In spring 3 and be aligned on the band 1 between adjacent two lattice cells 2, and by connect band 20 pressing
Chuck 10, makes the jig arm 11 of chuck 10 stretch into lattice cell 2 interior with pressuring spring 3.
It is additionally provided with bending section 21 on band 20, for walking around the guide pipe 5 on lattice cell screen work it addition, connect.
S2, fuel rod 4 is drawn axially in lattice cell 2 along fuel assembly.Owing to lattice cell 2 inner spring 3 is subject to
Chuck 10 is oppressed to remove and is preloaded, and fuel rod 4 will not be produced clamping action, and therefore spring 3 will not be right
The involucrum of fuel rod 4 causes scratch etc. to damage.
S3, chuck 10 is taken off on lattice cell screen work.After chuck 10 departs from band 1 and lattice cell 2, grid
Spring 3 in unit 2 resets because of restoring force effect, and fuel rod 4 produces chucking power, thus by fuel rod 4
It is fixed in lattice cell 2.
It is to be appreciated that in a fuel assembly, be interval with multiple grid between upper base and bottom nozzle
Unit's screen work.When assembling fuel rod 4, can the position of drawing in of corresponding fuel rod 4 multiple chucks 10 be clamped
On multiple lattice cell screen works, then fuel rod 4 is drawn in multiple lattice cell screen work the most successively along fuel assembly；
Or, chuck 10 is clamped on a lattice cell screen work, draws in fuel rod 4, more sequentially chuck 10 is pressed from both sides
Hold on next lattice cell screen work, draw in fuel rod 4, carry out with this.
It addition, in fuel assembly, before fuel rod 4 assembles, be first directed to pipe 5 and be plugged into lattice cell screen work
Guide pipe lattice cell on.
The foregoing is only embodiment of the present utility model, not thereby limit patent model of the present utility model
Enclose, every equivalent structure utilizing this utility model description and accompanying drawing content to be made or equivalence flow process conversion,
Or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in patent of the present utility model
In protection domain.
Claims (8)
1. fuel rod loads a protection device for fuel assembly, and for lattice cell screen work, described lattice cell screen work includes multiple lattice cell being separated to form by band；It is characterized in that, described fuel rod loads protection device and includes that at least one is held on the band of the described lattice cell of adjacent two and oppresses described lattice cell inner spring and removes the chuck preloaded；
Described chuck includes the interval two jig arm relatively and in being respectively protruding into two described lattice cells；Interval between two described jig arm is less than the maximum spacing of two adjacent described lattice cell inner springs, or the maximum spacing less than described lattice cell inner spring with its place band.
Fuel rod the most according to claim 1 load fuel assembly protection device, it is characterised in that the end, one end of described jig arm be provided with described spring contact, guide described jig arm along the guide part of described spring surface relative movement.
Fuel rod the most according to claim 2 loads the protection device of fuel assembly, it is characterised in that described guide part is bevelling or rounding.
Fuel rod the most according to claim 1 loads the protection device of fuel assembly, it is characterised in that described chuck also includes the connecting portion being connected between two described jig arm one end.
Fuel rod the most according to claim 1 loads the protection device of fuel assembly, it is characterised in that described jig arm and connecting portion are structure as a whole.
6. the protection device of fuel assembly is loaded according to the fuel rod described in any one of claim 1-5; it is characterized in that; this fuel rod loads the protection device of fuel assembly and also includes at least connection band coordinated in described lattice cell screen work side, and described chuck is connected to described connection on band towards described lattice cell screen work.
Fuel rod the most according to claim 6 loads the protection device of fuel assembly, it is characterised in that be additionally provided with the bending section for walking around guide pipe on described connection band.
Fuel rod the most according to claim 6 loads the protection device of fuel assembly; it is characterized in that; described connection band includes that at least one first connects band and at least one second connection band, and described first connects band connects the lattice cell on the corresponding described lattice cell screen work of band in being crisscross arranged with second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383874.4U CN205751535U (en) | 2016-04-29 | 2016-04-29 | Fuel rod loads the protection device of fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383874.4U CN205751535U (en) | 2016-04-29 | 2016-04-29 | Fuel rod loads the protection device of fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205751535U true CN205751535U (en) | 2016-11-30 |
Family
ID=57372715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620383874.4U Active CN205751535U (en) | 2016-04-29 | 2016-04-29 | Fuel rod loads the protection device of fuel assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN205751535U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761764A (en) * | 2016-04-29 | 2016-07-13 | 中广核研究院有限公司 | Protector and method for loading fuel rods into fuel assembly |
| WO2020173506A1 (en) * | 2019-02-27 | 2020-09-03 | 广东核电合营有限公司 | Fuel assembly and positioning grid |
-
2016
- 2016-04-29 CN CN201620383874.4U patent/CN205751535U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761764A (en) * | 2016-04-29 | 2016-07-13 | 中广核研究院有限公司 | Protector and method for loading fuel rods into fuel assembly |
| WO2020173506A1 (en) * | 2019-02-27 | 2020-09-03 | 广东核电合营有限公司 | Fuel assembly and positioning grid |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |