CN206806030U - A kind of enhancing anti-erosion performance grid with polyteny support spring - Google Patents
A kind of enhancing anti-erosion performance grid with polyteny support spring Download PDFInfo
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- CN206806030U CN206806030U CN201720190761.7U CN201720190761U CN206806030U CN 206806030 U CN206806030 U CN 206806030U CN 201720190761 U CN201720190761 U CN 201720190761U CN 206806030 U CN206806030 U CN 206806030U
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- spring
- grid
- fuel rod
- polyteny
- enhancing anti
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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 provides a kind of enhancing anti-erosion performance grid with polyteny support spring, and it is rectangular configuration, including positioning grid side wall；It is longitudinally just convex provided with two in each positioning grid side wall；It is described two just it is convex between be provided with novel spring；The novel spring is made up of at least two-stage spring.Enhancing anti-erosion performance grid provided by the utility model with polyteny support spring, vibration abrasion of the spring to fuel rod can be reduced, lifts fuel assembly overall security, effectively prevent that position grid spring during pull-rod produces scratch to fuel rod surface.
Description
Technical field
A kind of enhancing anti-erosion performance grid with polyteny support spring
Background technology
At present, international PWR fuel assembly grid is usually that rigid support coordinates clamping fuel with spring supporting
Rod, 2 springs are shared in this each grid four sides side wall of grid and 2 pairs firm convex (rigid supports) are inwardly protruding, each spring
Just convex to coordinating with a pair in the cell walls on opposite, spring provides chucking power, firm convex offer support, and the two clamping fuel rod reaches
Position purpose.
Utility model content
The utility model in view of the shortcomings of the prior art, proposes a kind of enhancing erosion resistance with polyteny support spring
Can grid.
Enhancing anti-erosion performance grid with polyteny support spring is rectangular configuration, including positioning grid side wall；Often
It is longitudinally just convex provided with two in individual positioning grid side wall；It is described two just it is convex between be provided with novel spring；The novel spring by
At least two-stage spring forms.
Preferably, first order spring is laterally or diagonally arranged, transverse ends are connected with positioning grid side wall, and centre is arched upward,
Form arch；
Preferably, the dome-shaped top surface shape is engaged with second level spring arrangement, and first order spring heights are less than second
Level spring, sliced boundary of slotting with the first order spring during preventing fuel rod pull-rod contact and scratch fuel rod surface.
Preferably, second level spring sets two spring faces, and described two spring faces are parallel or are symmetrically longitudinally arranged, described
Two spring faces both ends are connected in the dome-shaped top surface of first order spring, and center section is arched upward, and higher than first order spring, and keep one
Section plane, to provide the contact surface with fuel rod, chucking power is provided for fuel rod.
Preferably, contacted during fuel rod pull-rod with second level spring, the direction that second level spring is longitudinally arranged without sharp edge with
Fuel rod contacts, and can prevent fuel rod scratch.
Preferably, with 4 positioning grid side walls, connection surrounds rectangle to each grid from beginning to end successively.
Compared with prior art, the utility model has the advantages that：
1st, the enhancing anti-erosion performance grid provided by the utility model with polyteny support spring, using new bullet
Spring, the novel spring are the II type springs being longitudinally arranged, and single spring clamps fuel rod by two faces, pressure drop are not being produced
On the premise of excessive influence, the contact area of fuel rod and spring is effectively increased, and fuel rod is limited by multi-direction clamping
The free degree, it can effectively mitigate the abrasion of fuel rod.On the other hand the spring is is longitudinally arranged, fluting sliced boundary not with fuel rod
Contact, can prevent scratch fuel rod surface when fuel rod loads.
2nd, the enhancing anti-erosion performance grid provided by the utility model with polyteny support spring, can reduce spring
Vibration abrasion to fuel rod, lifts fuel assembly overall security, effectively prevents from positioning grid spring during pull-rod to fuel rod
Surface produces scratch.
Brief description of the drawings
Fig. 1 is the schematic diagram of the enhancing anti-erosion performance grid provided by the utility model with polyteny support spring.
Fig. 2 is the schematic diagram of positioning grid side wall provided by the utility model.
Fig. 3 is just convex schematic diagram provided by the utility model.
Fig. 4 is the just convex and schematic diagram of spring provided by the utility model.
Fig. 5 is the schematic diagram of second level spring provided by the utility model.
Fig. 6 is the V-shaped schematic diagram of one-level spring provided by the utility model fluting trimming.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
Fuel assembly is the critical component of nuclear reactor, and it produces heat and this heat energy is passed into cooling agent.Combustion
The performance of material component directly affects the security and economy of reactor.
Fuel assembly presses certain way arrangement form by the fuel rod of certain amount in fuel assembly skeleton.Each fuel
There are several to position grid on component skeleton, it is axially spaced apart.Positioning grid is welded to each other by metal band to be formed
Square grid formation, it clamps fuel rod with six contacts of the rigid support in each grid and spring composition, for combustion
Charge bar positions.
Fuel assembly heat energy is produced by fuel rod, and fuel rod is slender rod shaped structure, is mainly coated by outer tubular involucrum
Some cylindrical pellets are formed.Fuel rod is axially and transversely positioned axially through fuel assembly by positioning grid.Fuel
During assembling components, fuel rod produces horizontal chucking power through the grid for positioning grid, compression set grid side wall spring with just convex.
Fuel rod is positioned inside fuel assembly by the chucking power.Meanwhile positioning grid also there is certain protection to make fuel rod
With.Positioning grid spring should generally possess following characteristics：
1. possesses appropriate chucking power, it is ensured that runtime internal combustion charge bar can be positioned inside fuel assembly；Prevent fuel
Rod overbending, coolant flow passages reduce between causing consecutive fuel rod, and DNB (departure nucleate boiling) allowance declines；Suppress fuel
The Flow vibration of rod.
2. spring there should be more abundant and stable contact between fuel rod, prevent long-term Flow vibration from causing spring
Abrasion is produced to fuel rod clad.
Spring and whole positioning grid have enough intensity, and keep rational stress state after fuel rod loading,
Prevent permanent deformation, fracture, fatigue failure or stress corrosion cracking.
As shown in figures 1 to 6, the enhancing anti-erosion performance grid with polyteny support spring is rectangular configuration, including positioning
Grid side wall 1；Two firm convex 2 are longitudinally provided with each positioning grid side wall 1；Novel spring is provided between described two firm convex 2
3；The novel spring is made up of at least two-stage spring.First order spring 31 laterally or diagonally arranges that transverse ends are with positioning grid
Lattice side wall 1 is connected, and centre is arched upward, and forms arch；The dome-shaped top surface shape is engaged with the arrangement of second level spring 32, the first order
High 31 degree of spring is less than second level spring 32, contacts during preventing fuel rod pull-rod and draws with first order spring fluting sliced boundary
Hinder fuel rod surface.Second level spring 32 sets two spring faces, and described two spring faces are parallel or are symmetrically longitudinally arranged, described
Two spring faces both ends are connected in the dome-shaped top surface of first order spring 31, and center section is arched upward, higher than first order spring 31, and protected
One section of plane is held, to provide the contact surface with fuel rod, chucking power is provided for fuel rod.During fuel rod pull-rod with second level spring
32 contacts, the direction that second level spring 32 is longitudinally arranged contact without sharp edge with fuel rod, can prevent fuel rod scratch.Each grid
Lattice have 4 positioning grid side walls 1, and head and the tail connection surrounds rectangle successively.
Spring as shown in Figure 2 be in integrally II types, in side wall upper part and bottom one first order spring (3) of each setting, first
Level spring (3) laterally or diagonally arranges that example is lateral arrangement in figure.When being in tilted layout, 5 trimmings of being slotted per one-level spring are in V
Type is as shown in Figure 6.First order both ends of the spring as shown in Figure 3 is connected with grid side wall, and root passes through round-corner transition, center section lift
Rise, and coordinate the arrangement of second level spring to be arranged to respective shapes, the connection for second level spring provides fulcrum.First order spring
Highly it is less than second level spring, to avoid producing scratch with its EDGE CONTACT during fuel rod pull-rod.First order spring uses
The mode of lateral arrangement can also reduce pressure drop caused by spring.
The second level as shown in Figure 3 spring heights are higher than first order spring, and second level spring sets two spring faces, two bullets
Spring face is arranged in II types, clamps fuel rod from both sides respectively.In the present embodiment, spring face is rectangle, or other shapes.Two
Individual spring face both ends are connected with two first order springs (3) respectively, and by round-corner transition, center section is raised.As shown in figure 5,
Raised portion keeps longer straightway among second level spring (4), there is provided the longer contact length with fuel rod.Bilateral clamp and
Longer contact length can mitigate the abrasion of fuel rod.
The other embodiments of this patent as shown in Figure 6, first order spring lateral arrangement, the spring face of second level spring two merge
For a big spring face, big spring face is designed as circular arc, and circular arc is concentric with fuel rod, and radius matches with fuel rod radius, greatly
Spring face effectively increases spring and fuel rod contact area, can equally play a part of mitigating fuel rod abrasion.
Compared with prior art, the present embodiment has the advantages that：
1st, the enhancing anti-erosion performance grid with polyteny support spring that the present embodiment provides, using novel spring,
The novel spring is the II type springs being longitudinally arranged, and single spring clamps fuel rod by two faces, pressure drop do not produced
On the premise of big influence, the contact area of fuel rod and spring is effectively increased, and fuel rod is limited certainly by multi-direction clamping
By spending, it can effectively mitigate the abrasion of fuel rod.On the other hand to be longitudinally arranged, fluting sliced boundary does not connect the spring with fuel rod
Touch, scratch fuel rod surface when fuel rod loads can be prevented.
2nd, the enhancing anti-erosion performance grid with polyteny support spring that the present embodiment provides, can reduce spring pair
The vibration abrasion of fuel rod, lifts fuel assembly overall security, effectively prevents from positioning grid spring during pull-rod to fuel rod table
Face produces scratch.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For system disclosed in embodiment
For, due to corresponding to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Those skilled in the art can realize described function using distinct methods to each specific application, but
It is this realization it is not considered that exceeding the scope of the utility model.
Obviously, it is new without departing from this practicality can to carry out various changes and modification to utility model by those skilled in the art
The spirit and scope of type.So, if these modifications and variations of the present utility model belong to the utility model claims and its
Within the scope of equivalent technologies, then the utility model is also intended to including these changes and modification.
Claims (6)
- A kind of 1. enhancing anti-erosion performance grid with polyteny support spring, it is characterised in that it is rectangular configuration, including it is fixed Position grid side wall；It is longitudinally just convex provided with two in each positioning grid side wall；It is described two just it is convex between be provided with novel spring；Institute Novel spring is stated to be made up of at least two-stage spring.
- 2. a kind of enhancing anti-erosion performance grid with polyteny support spring according to claim 1, its feature exist In first order spring is laterally or diagonally arranged, transverse ends are connected with positioning grid side wall, and centre is arched upward, and form arch.
- 3. a kind of enhancing anti-erosion performance grid with polyteny support spring according to claim 2, its feature exist In dome-shaped top surface shape is engaged with second level spring arrangement, and first order spring heights are less than second level spring, to prevent fuel Contacted during rod pull-rod with first order spring fluting sliced boundary and scratch fuel rod surface.
- 4. a kind of enhancing anti-erosion performance grid with polyteny support spring according to claim 2, its feature exist In second level spring sets two spring faces, and described two spring faces are parallel or are symmetrically longitudinally arranged, the two springs face both ends Connected in the dome-shaped top surface of first order spring, center section is arched upward, and higher than first order spring, and one section of plane is kept, to carry For the contact surface with fuel rod, chucking power is provided for fuel rod.
- 5. a kind of enhancing anti-erosion performance grid with polyteny support spring according to claim 4, its feature exist Contacted when, fuel rod pull-rod with second level spring, the direction that second level spring is longitudinally arranged contacts without sharp edge with fuel rod, can To prevent fuel rod scratch.
- 6. a kind of enhancing anti-erosion performance grid with polyteny support spring according to claim 1, its feature exist In each grid has 4 positioning grid side walls, and connection surrounds rectangle from beginning to end successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720190761.7U CN206806030U (en) | 2017-02-28 | 2017-02-28 | A kind of enhancing anti-erosion performance grid with polyteny support spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720190761.7U CN206806030U (en) | 2017-02-28 | 2017-02-28 | A kind of enhancing anti-erosion performance grid with polyteny support spring |
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| CN206806030U true CN206806030U (en) | 2017-12-26 |
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| CN201720190761.7U Active CN206806030U (en) | 2017-02-28 | 2017-02-28 | A kind of enhancing anti-erosion performance grid with polyteny support spring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477360A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Annular fuel assembly location grillwork |
-
2017
- 2017-02-28 CN CN201720190761.7U patent/CN206806030U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477360A (en) * | 2020-05-25 | 2020-07-31 | 中国原子能科学研究院 | Annular fuel assembly location grillwork |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |