CN204884578U - Bilayer is compound to be kept grid and has this fuel assembly who keeps grid - Google Patents
Bilayer is compound to be kept grid and has this fuel assembly who keeps grid Download PDFInfo
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- CN204884578U CN204884578U CN201520482134.1U CN201520482134U CN204884578U CN 204884578 U CN204884578 U CN 204884578U CN 201520482134 U CN201520482134 U CN 201520482134U CN 204884578 U CN204884578 U CN 204884578U
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- grid
- parting bead
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- keeps
- mix
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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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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a bilayer is compound to be kept grid and has this fuel assembly who keeps grid keeps the grid to include mixing the grid, supporting the grid of range upon range of fixed connection. Mix the grid and include first grid body and mix the device, be formed with on the first grid body and support the relative first passageway of grid, first passageway including supply that the fuel rod wears to establish wear to establish the region and but the liquid stream circulation of leading to is regional formed at wearing to establish regional peripheral cooling. It includes the portion of mixing to stretching out to mix the device in the region of circulating. Support the grid and include second grid body, be formed with on the second grid body and wear to establish the regional second channel that supplies the fuel rod to wear to establish that corresponds. Mix the grid and support grid rigidity, reduce coolant liquid loss of pressure, make the fuel rod atress balanced, mix the grid and support the grid and independently to design, need not consider mutual interference, guaranteeing that it can promote and mix the performance according to the space environment design of reality to mix the device to under the fuel rod location prerequisite of wearing to establish.
Description
Technical field
The utility model relates to nuclear power field, more particularly, relates to a kind of double-layer composite and keeps grid and the fuel assembly with this maintenance grid.
Background technology
Pencil support grid in correlation technique generally includes two longitudinally stacked grid portions, two grid portions are respectively equipped with curve support bar, during in two grid portions in horizontal relative movement, two both sides of curve support band to fuel rod clamp, cause fuel rod stressed not in same level in the horizontal like this, define unbalanced moment, introduce the trend that fuel rod is axially inclined to, unfavorable to fuel rod clad integrality.
In addition, longitudinally stacked structure causes two grid portion bracing strips and is difficult to maintenance longitudinally accurate positioning completely, once misplace, will introduce the huge pressure loss.The increase of the pressure loss is unfavorable for the operation of reactor.
Curve support bar and grid portion allow the version that horizontal relative motion occurs significantly can reduce physical strength.In addition, when being subject to outside horizontal direction and impacting, because curve support bar directly contacts with fuel rod, easily damage is caused to fuel rod, cause radiomaterial and leak.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of double-layer composite of improvement to keep grid and the fuel assembly with this maintenance grid.
The utility model solves the technical scheme that its technical matters adopts: construct a kind of double-layer composite and keep grid, comprise stacked be fixedly connected with mix grid, supportive grid;
Described grid of mixing comprises the first grid body and mixes device, described first grid body is formed with at least one first passage relative with described supportive grid, described first passage comprise wear for fuel rod wear region and wear the circulating area of area peripheral edge for liquid coolant circulation described in being formed at;
Described device of mixing comprises at least one of stretching out in described circulating area and mixes portion;
Described supportive grid comprises the second grid body, described second grid body is formed and wears the corresponding second channel worn for described fuel rod in region with described.
Preferably, the supporting mechanism for clamping described fuel rod is provided with in described second channel.
Preferably, described maintenance grid also comprise be around in described in mix grid, enclosed device that supportive grid outer ring is closed border.
Preferably, described first grid body comprises at least one first parting bead arranged along first direction and second parting bead that at least one is arranged along second direction, described first parting bead, the mutual formation arranged in a crossed manner of the second parting bead first passage described at least one;
Described second grid body comprises at least one the 3rd parting bead arranged along described first direction and at least one the 4th parting bead arranged along described second direction, described 3rd parting bead, at least one described second channel of the mutual formation arranged in a crossed manner of the 4th parting bead.
Preferably, the portion of mixing described in comprise by described first parting bead and/or described second parting bead and the opposing side of described supportive grid second grid body turn down in described circulating area arrange mix the wing.
Preferably, described first parting bead and/or described second parting bead are provided with at least one limiting section arranged in described first passage, wear region described in described limiting section defines, to carry out spacing to the described fuel rod worn.
Preferably, described supporting mechanism comprises the elastic arm being arranged on and described 3rd parting bead and/or the 4th parting bead arching upward in described second channel and arranges; And/or,
Described supporting mechanism comprises the positioning convex be arranged on to described second channel internal projection setting on described 3rd parting bead and/or the 4th parting bead.
Preferably, the described enclosed device border comprised along described second grid body arrange and be connected with the border of described second grid body enclose plate, described in enclose plate hight and go out described second grid body, to form the cavity volume mixing grid described in accommodation; Or,
Described enclosed device comprises first and encloses plate, second and enclose plate, described first enclose plate along described first grid body border arrange and be connected with the border of described first grid body, described second encloses plate arranges along the border of described second grid body and is connected with the border of described second grid body, and described first encloses the edge that plate, second encloses plate adjacent is interconnected.
Preferably, described first direction, second direction are mutually vertical, described first parting bead, the second parting bead, the 3rd parting bead, the 4th parting bead are all in lath-shaped, the plate face of described first parting bead, the 3rd parting bead is vertical with described second direction, and the plate face of described second parting bead, the 4th parting bead is vertical with described first direction.
Preferably, the thickness of described first parting bead, the second parting bead is less than the thickness of described 3rd parting bead, the 4th parting bead.
Preferably, the crossover location of described first parting bead, the second parting bead is provided with both interconnective weld parts, and described weld part comprises the solder joint be positioned at on described point of crossing of mixing the opposing side of the wing; And/or,
Described weld part comprises the solder joint be positioned at on described point of crossing of mixing wing side limit; And/or,
Described weld part comprise be formed at described first parting bead, weld seam that the intersection of the second parting bead is sewed on.
The utility model also constructs a kind of fuel assembly, comprises described double-layer composite and keeps grid.
Implement double-layer composite of the present utility model and keep grid and the fuel assembly with this maintenance grid, there is following beneficial effect: mix grid and supportive grid is independently arranged, accurate positioning between the two after assembling, position is fixed, be conducive to the pressure loss of the liquid coolant reducing to flow through, make the stress equalization of fuel rod.Meanwhile, mixing grid and supportive grid can more independent design separately, and need not consider interference each other, ensure under the prerequisite to the fuel rod positioning clamping worn, mixing device according to the space environment design of reality, can promote and mix performance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the decomposing state internal cross section schematic diagram of the double-layer composite maintenance grid in the utility model embodiment;
Fig. 2 is the assembling schematic diagram mixed in grid first passage that fuel rod wears in Fig. 1;
Fig. 3 is that the first passage mixing grid in Fig. 1 is when being provided with limiting section in other embodiments and the assembling schematic diagram of fuel rod.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figures 1 and 2, the fuel assembly in the utility model preferred embodiment comprises double-layer composite and keeps grid 1 and be arranged on the fuel rod 2 kept on grid 1.Keep grid 1 comprise stacked be fixedly connected with mix grid 11, supportive grid 12, also comprise be around in mix grid 11, enclosed device 13 that supportive grid 12 outer ring is closed border.
In certain embodiments, mix grid 11 comprise the first grid body 111 and mix device 112, first grid body 111 is formed with at least one first passage relative with supportive grid 12 113, first passage 113 comprises the region 1131 that wears worn for fuel rod 2 and wears the circulating area 1132 of region 1131 periphery for liquid coolant circulation with being formed at.
Further, first grid body 111 comprises multiple the first parting bead 1111 along first direction setting and multiple the second parting bead 1112 arranged along second direction, the multiple first passage 113 of the first mutual formation arranged in a crossed manner of parting bead 1111, second parting bead 1112, the outer shape of first passage 113 does not limit, can be square, circular etc., also can be non-close profile, after coordinating with enclosed device 13, form enclosed construction.First parting bead 1111, second parting bead 1112 can be connected by modes such as welding, in other embodiments, first grid body 111 also can be formed as one, and the first parting bead 1111, second parting bead 1112 also can be respectively one, can form first passage 113 after the intersection.
In certain embodiments, the crossover location of the first parting bead 1111, second parting bead 1112 is formed both interconnective weld parts, owing to mixing grid 11, supportive grid 12 is independently two parts, when grid 11 is stired and make muddy in making, after first parting bead 1111, second parting bead 1112 intersects, block welding gun and stretch in first passage 113 in order to avoid mixing the wing and go weldering, weld part can only include the solder joint on the point of crossing being positioned at a side opposing with mixing the wing, only welds this point of crossing.Certainly, weld part also can only include the solder joint be positioned at mixing on the point of crossing on wing side limit.
To proof strength, weld part also can only include the weld seam that the intersection that is formed at the first parting bead 1111, second parting bead 1112 is sewed on.Allow welding gun can stretch into first passage 113 to intersection seam welding, the first parting bead 1111, second parting bead 1112 after intersection can being turned, allowing welding gun stretch into first passage 113 by a side opposing with mixing the wing, weld along intersection seam, form longer weld part, can weld strength be ensured.
Further, also can be formed in three, the point of crossing position grouping intersecting seam and intersect seam two opposite end and carry out welding formation weld part, the welding technology demand of intensity and welding gun can be met.In certain embodiments, mix device 112 to comprise at least one of stretching out in circulating area 1132 and mix portion.The portion of mixing comprise by the first parting bead 1111 and the second parting bead 1112 side opposing with supportive grid 12 second grid body 121 turn down in circulating area 1132 arrange mix the wing, the quantity mixing the wing can be one or more, also can arrange on the first parting bead 1111 or the second parting bead 1112 separately and mix portion.When liquid coolant flows to supportive grid 12 side, the effect of mixing liquid coolant can be played by the portion of mixing, and promotes cooling effect.In other embodiments, the portion of mixing also can be and can change mixing groove or mixing bar of coolant flow stability, or is multiple combinations.
Supportive grid 12 comprises on the second grid body 121, second grid body 121 and is formed with the second channel 122 that for fuel rod 2 wear corresponding to wearing region 1131, is provided with the supporting mechanism 123 for clamping fuel rod 2 in second channel 122.
Second grid body 121 comprises multiple the 3rd parting bead 1211 of arranging along first direction and the multiple second channel 122 of multiple the 4th parting bead the 1212, three parting bead 1211, mutual formation arranged in a crossed manner of the 4th parting bead 1212 arranged along second direction.The outer shape of second channel 122 does not limit, and can be square, circular etc., also can be non-close profile, after coordinating with enclosed device 13, form enclosed construction.3rd parting bead 1211, the 4th parting bead 1212 can be connected by modes such as welding, in other embodiments, second grid body 121 also can be formed as one, and the 3rd parting bead 1211, the 4th parting bead 1212 also can be respectively one, can form second channel 122 after the intersection.
Supporting mechanism 123 comprises the elastic arm being arranged on and the 3rd parting bead 1211 and the 4th parting bead 1212 arching upward in second channel 122 and arranges, elastic arm by elasticity to fuel rod 2 clamp standoff.Certainly, also only elastic arm can be set on the 3rd parting bead 1211 or the 4th parting bead 1212.When reality uses, the differing heights of same fuel rod 2 is arranged respectively and keeps grid 1, can keep grid 1 arranges supporting mechanism, fuel rod 2 can be clamped in the part of same fuel rod 2.
In other embodiments, supporting mechanism 123 comprise be arranged on the 3rd parting bead 1211 and the 4th parting bead 1212 to second channel 122 internal projection arrange positioning convex, positioning convex to the sidewall of fuel rod 2 against clamping.Certainly, also only positioning convex can be set on the 3rd parting bead 1211 or the 4th parting bead 1212.Further, elastic arm and positioning convex also can combination settings on the 3rd parting bead 1211, the 4th parting bead 1212 simultaneously.
As shown in Figure 3, in other embodiments, first parting bead 1111 and the second parting bead 1112 are also respectively equipped with the limiting section 1113 arranged in first passage 113, limiting section 1113 defines and wears region 1131, to carry out spacing to the fuel rod 2 worn, prevent the horizontal off normal of fuel rod 2, and supporting mechanism 123 acts on to fuel rod 2 jointly, locates fuel rod 2.Limiting section 1113 does not clamp fuel rod 2, prevents from causing damage to fuel rod 2.Certainly, also only limiting section 1113 can be set on the first parting bead 1111 or the second parting bead 1112.
Again as shown in Figures 1 and 2, preferably, first direction and second direction are mutually vertical, and the first parting bead 1111, second parting bead 1112, the 3rd parting bead 1211, the 4th parting bead 1212 are all in lath-shaped.The plate face of the first parting bead 1111, the 3rd parting bead 1211 is vertical with second direction, and the plate face of the second parting bead 1112, the 4th parting bead 1212 is vertical with first direction.The second channel 122 that first parting bead 1111, second parting bead 1112 intersects to form first passage the 113, three parting bead 1211 of rectangle, the 4th parting bead 1212 intersects to form rectangle.In other embodiments, first direction and second direction also can out of plumb.
Further, the thickness of the first parting bead 1111, second parting bead 1112 is less than the thickness of the 3rd parting bead 1211, the 4th parting bead 1212, the profile of first passage 113 can be made to be greater than the profile of second channel 122, and then increase the mobility of liquid coolant at first passage 113, reduce the integral pressure loss that two-layer compound keeps grid.
In certain embodiments, enclosed device 13 border comprised along the second grid body 121 arrange and is connected with the border of the second grid body 121 enclose plate, enclose plate hight and go out the second grid body 121, mix the cavity volume of grid 11 to form accommodation.Keep grid 1 when mounted, first be connected enclosing the border of plate around supportive grid 12 and supportive grid 12 by the mode such as welding, putting into and enclose plate by mixing grid 11 and enclose in the cavity volume that supportive grid 12 formed again, allowing enclosed device 13 and mixing grillwork 11 be connected by the mode such as welding.Mix grid 11 and supportive grid accurate positioning, meanwhile, can not relative motion be produced between the two, be conducive to reducing liquid coolant and flow through the pressure loss keeping grid 1.
Certainly, in other embodiments, enclosed device 13 comprises first and encloses plate, second and enclose plate, first enclose plate along the first grid body 111 border arrange and is connected with the border of the first grid body 111, second enclose plate along the second grid body 121 border setting and be connected with the border of the second grid body 121.When keeping grid 1 to install, by with first enclose plate mix grid 11 and enclose the supportive grid 12 of plate with second stacked, enclose by the mode such as welding the edge that plate, second encloses plate adjacent respectively by first to be again interconnected, and grid 11 will be mixed and supportive grid 12 is interconnected, keep stability.
In other embodiments, enclosed device 13 also can be cancelled, and mixes first parting bead 1111, second parting bead 1112 of outer ring by correspondence of grid 11 and supportive grid 12, the 3rd parting bead 1211, the 4th parting bead 1212 enclose.
Understandably, above-mentioned each technical characteristic can combination in any use and unrestricted.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (12)
1. double-layer composite keep a grid, it is characterized in that, comprise stacked be fixedly connected with mix grid (11), supportive grid (12);
Described grid (11) of mixing comprises the first grid body (111) and mixes device (112), described first grid body (111) is formed with at least one first passage (113) relative with described supportive grid (12), described first passage (113) comprise wear for fuel rod (2) wear region (1131) and wear the circulating area (1132) that region (1131) periphery circulates for liquid coolant described in being formed at;
Described device (112) of mixing comprises at least one of stretching out in described circulating area (1132) and mixes portion;
Described supportive grid (12) comprises the second grid body (121), described second grid body (121) is formed and wears the corresponding second channel (122) worn for described fuel rod (2) in region (1131) with described.
2. double-layer composite according to claim 1 keeps grid, it is characterized in that, being provided with the supporting mechanism (123) for clamping described fuel rod (2) in described second channel (122).
3. double-layer composite according to claim 1 keeps grid, it is characterized in that, described maintenance grid (1) also comprise be around in described in mix grid (11), enclosed device (13) that supportive grid (12) outer ring is closed border.
4. double-layer composite according to claim 2 keeps grid, it is characterized in that, described first grid body (111) comprises at least one the first parting bead (1111) arranged along first direction and at least one second parting bead (1112) along second direction setting, described first parting bead (1111), the mutual formation arranged in a crossed manner of the second parting bead (1112) first passage (113) described at least one;
Described second grid body (121) comprises at least one the 3rd parting bead (1211) arranged along described first direction and the 4th parting bead (1212) that at least one is arranged along described second direction, described 3rd parting bead (1211), at least one described second channel (122) of the mutual formation arranged in a crossed manner of the 4th parting bead (1212).
5. double-layer composite according to claim 4 keeps grid, it is characterized in that, described in the portion of mixing comprise by the side that described first parting bead (1111) and/or described second parting bead (1112) and described supportive grid (12) second grid body (121) are opposing turn down in described circulating area (1132) arrange mix the wing.
6. double-layer composite according to claim 4 keeps grid, it is characterized in that, described first parting bead (1111) and/or described second parting bead (1112) are provided with at least one limiting section (1113) arranged in described first passage (113), region (1131) is worn, to carry out spacing to the described fuel rod (2) worn described in described limiting section (1113) defines.
7. double-layer composite according to claim 4 keeps grid, it is characterized in that, described supporting mechanism (123) comprises the elastic arm being arranged on and described 3rd parting bead (1211) and/or the 4th parting bead (1212) arching upward in described second channel (122) and arranges; And/or,
Described supporting mechanism (123) comprises the positioning convex be arranged on to the setting of described second channel (122) internal projection on described 3rd parting bead (1211) and/or the 4th parting bead (1212).
8. double-layer composite according to claim 3 keeps grid, it is characterized in that, described enclosed device (13) comprise along described second grid body (121) border arrange and be connected with the border of described second grid body (121) enclose plate, the described plate hight that encloses goes out described second grid body (121), to form the cavity volume mixing grid (11) described in accommodation; Or,
Described enclosed device (13) comprises first and encloses plate, second and enclose plate, described first enclose plate along described first grid body (111) border arrange and be connected with the border of described first grid body (111), described second encloses plate arranges along the border of described second grid body (121) and is connected with the border of described second grid body (121), and described first encloses the edge that plate, second encloses plate adjacent is interconnected.
9. double-layer composite according to claim 4 keeps grid, it is characterized in that, described first direction, second direction are mutually vertical, described first parting bead (1111), the second parting bead (1112), the 3rd parting bead (1211), the 4th parting bead (1212) are all in lath-shaped, the plate face of described first parting bead (1111), the 3rd parting bead (1211) is vertical with described second direction, and the plate face of described second parting bead (1112), the 4th parting bead (1212) is vertical with described first direction.
10. double-layer composite according to claim 9 keeps grid, and it is characterized in that, the thickness of described first parting bead (1111), the second parting bead (1112) is less than the thickness of described 3rd parting bead (1211), the 4th parting bead (1212).
11. double-layer composite according to claim 5 keep grid, it is characterized in that, the crossover location of described first parting bead (1111), the second parting bead (1112) is formed both interconnective weld parts, and described weld part comprises the solder joint be positioned at on described point of crossing of mixing the opposing side of the wing; And/or,
Described weld part comprises the solder joint be positioned at on described point of crossing of mixing wing side limit; And/or,
Described weld part comprise be formed at described first parting bead (1111), weld seam that the intersection of the second parting bead (1112) is sewed on.
12. 1 kinds of fuel assemblies, is characterized in that, the double-layer composite comprised described in any one of claim 1 to 11 keeps grid (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520482134.1U CN204884578U (en) | 2015-07-06 | 2015-07-06 | Bilayer is compound to be kept grid and has this fuel assembly who keeps grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520482134.1U CN204884578U (en) | 2015-07-06 | 2015-07-06 | Bilayer is compound to be kept grid and has this fuel assembly who keeps grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204884578U true CN204884578U (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520482134.1U Active CN204884578U (en) | 2015-07-06 | 2015-07-06 | Bilayer is compound to be kept grid and has this fuel assembly who keeps grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204884578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
-
2015
- 2015-07-06 CN CN201520482134.1U patent/CN204884578U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
| WO2019056222A1 (en) * | 2017-09-20 | 2019-03-28 | 岭澳核电有限公司 | Positioning grid and fuel assembly |
| CN107980163B (en) * | 2017-09-20 | 2020-05-22 | 岭澳核电有限公司 | Spacer grid and fuel assembly |
| GB2581891A (en) * | 2017-09-20 | 2020-09-02 | Ling Ao Nuclear Power Coltd | Positioning grid and fuel assembly |
| EP3686900A4 (en) * | 2017-09-20 | 2020-10-07 | Ling Ao Nuclear Power Co., Ltd. | Positioning grid and fuel assembly |
| GB2581891B (en) * | 2017-09-20 | 2022-02-23 | Ling Ao Nuclear Power Co Ltd | Spacer grid and fuel assembly |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
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Address after: 518031 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Patentee after: China General Nuclear Power Corporation Patentee after: China wide nuclear electricity incorporated company Address before: 518031 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Patentee before: China General Nuclear Power Corporation Patentee before: China wide nuclear electricity incorporated company |