JPS62174686A - Support lattice - Google Patents
Support latticeInfo
- Publication number
- JPS62174686A JPS62174686A JP61016347A JP1634786A JPS62174686A JP S62174686 A JPS62174686 A JP S62174686A JP 61016347 A JP61016347 A JP 61016347A JP 1634786 A JP1634786 A JP 1634786A JP S62174686 A JPS62174686 A JP S62174686A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- lattice
- support
- support plate
- fixing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
- Table Devices Or Equipment (AREA)
- Chairs Characterized By Structure (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、原子炉用燃料集合体において、複数の燃料
棒を支持する支持格子の改良に関する乙のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of a support grid for supporting a plurality of fuel rods in a nuclear reactor fuel assembly.
［従来の技術］
従来、この種の支持格子としては、第６図および第７図
に示すものが提供されている。[Prior Art] Conventionally, as this type of support grid, those shown in FIGS. 6 and 7 have been provided.
これらの図に示す支持格子は、多数の格子空間１・・・
を画成するように複数のストラップ２・・を互いに垂直
に交差さＵｏて組み立てられた格子３と、格子空間ｌの
対辺距離とほぼ同じ内径を有し、上記格子空間ｌの所定
のものと軸線を一致させてその格子に固定された複数の
スリーブ４・・・とから構成された６のであり、格子空
間１を画成ずろ４枚のストラップ２・・・の格子空間部
分におけろ軸線方向上縁部に、格子空間１の軸線方向に
突出し、かろ互いに離間した一対の支持板部５・５がそ
れぞれ形成されたものである。The support grid shown in these figures consists of a number of grid spaces 1...
A lattice 3 assembled by vertically intersecting a plurality of straps 2 to define a lattice 3 having an inner diameter approximately equal to the distance across opposite sides of the lattice space l, and a predetermined one of the lattice space l. A plurality of sleeves 4 are fixed to the lattice with their axes aligned with each other, and the lattice space 1 is defined by four straps 2... A pair of support plate parts 5, 5 are formed on the upper edge of the grid space 1, respectively, and project in the axial direction of the grid space 1, and are spaced apart from each other.
ここで、支持板部５・５は、それぞれ三角形状をなすも
ので、互いに向かい合った側部５ａ・５ａが格子空間１
の軸線に平行となるように形成されている。そして、こ
れら支持板部５・・・の間に上記スリーブ４が配置され
るとともに、スリーブ４の外壁部と支持板部５の側部５
ａとが溶接固着され、これによって、スリーブ４は格子
２に固定されている。Here, the support plate parts 5, 5 are triangular in shape, and the side parts 5a, 5a facing each other are connected to the lattice space 1.
It is formed parallel to the axis of. The sleeve 4 is arranged between these support plate parts 5, and the outer wall part of the sleeve 4 and the side part 5 of the support plate part 5.
The sleeve 4 is fixed to the grid 2 by welding.
［発明が解決しようとする問題点］
ところで、上記スリーブと支持板部とを強固に溶接固着
するためには、両者の溶接時において支持板部の側部と
スリーブの外壁面とが隙間なく接触している必要があり
、そのためには、ストラップ同士の間隔を均一に、しか
も高精度に組み立てなければならない。[Problems to be Solved by the Invention] Incidentally, in order to securely weld the sleeve and the support plate, it is necessary to ensure that the side of the support plate and the outer wall surface of the sleeve are in contact with each other without a gap when welding the two. To achieve this, the straps must be spaced evenly and assembled with high precision.
ところか、上記支持格子では、その格子を、多数のスト
ラップをスポット溶接等によって連結して組み立ててい
るので、ストラップ同士の間隔にかなりのばらつきが生
じ、また、上記のように高い精度で組み立てるのは極め
て困難である。したがって、スリーブと支持板部との間
に両者の溶接時においてかなりの隙間が生じており、そ
のため溶岩不良が発生ずることがあり、このような場合
にスリーブと格子の離脱による燃料集合体の分解等の事
故が発生ずる危険性があるという問題があった。However, in the above-mentioned support grid, the grid is assembled by connecting a large number of straps by spot welding, etc., so there is considerable variation in the spacing between the straps, and it is difficult to assemble with high precision as described above. is extremely difficult. Therefore, a considerable gap is created between the sleeve and the support plate when they are welded, which may result in lava failure. There was a problem that there was a risk of accidents such as the following.
［発明の目的］
この発明は、上記事情に鑑みてなされたもので、スリー
ブの外壁面と支持板部との間に隙間が発生ずることがな
く、したがって、スリーブと支持板部とを強固に溶接固
着することができる支持格子を提供することを目的とす
る。[Object of the Invention] The present invention has been made in view of the above circumstances, and it is possible to prevent a gap from occurring between the outer wall surface of the sleeve and the support plate portion, and therefore to firmly connect the sleeve and the support plate portion. The object is to provide a support grid that can be fixed by welding.
［問題点を解決するための手段］
この発明の支持格子は、支持板部のこれと対をなす支持
板部側の側部に、スリーブの外周に沿って延出す゛る固
着板部を、各固着板部のスリーブ側を向く面の延出方向
先端部に内接する円が上記スリーブの直径よりも若干小
径となるように形成して構成したものである。[Means for Solving the Problems] The support grid of the present invention includes fixing plate portions extending along the outer periphery of the sleeve on the side of the support plate portion that is paired with the support plate portion. A circle inscribed in the distal end in the extending direction of the surface facing the sleeve of the fixing plate is formed to have a slightly smaller diameter than the diameter of the sleeve.
［作用コ
上記構成の支持格子にあっては、各固着板部のスリーブ
側を向く面の延出方向先端部に内接する円がスリーブの
直径よりも若干小径となっているので、ストラップ同士
の間隔にばらつきがある場合においても、スリーブを各
支持板部の間に配置する際に、各固若部がその延出方向
先端部をスリーブの外壁面に接触させた状態でスリーブ
の半径方向外方に弾性変形し、これによって固着板部を
常にスリーブに接触させておくことができ、両者を強固
に溶接固着することができる。[Operation] In the support grid having the above configuration, the circle inscribed in the tip of the surface facing the sleeve in the extending direction of each fixing plate has a diameter slightly smaller than the diameter of the sleeve, so the straps can Even if the spacing varies, when the sleeve is placed between the support plate parts, each rigid part will move outward in the radial direction of the sleeve with its extending end in contact with the outer wall surface of the sleeve. As a result, the fixing plate portion can be kept in contact with the sleeve at all times, and both can be firmly welded and fixed.
［実施例］
第１図はこの発明の一実施例を示すものであって、支Ｉ
ｊ？格子のスリーブ部分を示す図である。[Embodiment] FIG. 1 shows an embodiment of the present invention.
j? FIG. 6 is a diagram showing a sleeve portion of the lattice.
この図において符号６は格子である。格子６は、多数の
格子空間（図では１つ）７を画成するように複数のスト
ラップ８・・・を互いに垂直に交差させて組み立てたも
のである。上記（各子空間７のうち所定の位置のものに
は格子空間７と軸線を一致させたスリーブ９が固定され
ている。スリーブ９は、円筒状をなす乙ので、その内径
は格子空間７の対辺寸法とほぼ同一の寸法となるように
形成されている。In this figure, reference numeral 6 is a lattice. The lattice 6 is constructed by assembling a plurality of straps 8 perpendicularly intersecting each other so as to define a large number of lattice spaces (one in the figure) 7. A sleeve 9 whose axis coincides with the lattice space 7 is fixed to a predetermined position of each of the child spaces 7 mentioned above.The sleeve 9 has a cylindrical shape, so its inner diameter is It is formed to have approximately the same dimension as the opposite side dimension.
一方、上記スリーブ９に対応する４枚のストラップ８の
縁部には、格子空間７の軸線方向スリーブ９側に突出し
、かつ、互いに離間した一対の支持板部１０・１０がそ
れぞれ形成されている。支Ｎｊ板部１０・１０は、第３
図に示すように、台形状をなすムのであり、ストラップ
８の縁部から軸線方向スリーブ９側に突出する三角形状
の基部１１と、この基部Ｈのこれと対をなす基部ＩＩ側
の四部からスリーブ９の外周に沿って延出する固着板部
１２とから構成されている。固着板部１２は、第２図に
示すように、スリーブ９の半径よりも大きな曲率半径の
円弧状に形成され、延出方向を向く側部１２ａが格子窓
ｕ、ｉ′Ｉ７のす１１１線に平行になるように形成され
ている。On the other hand, at the edges of the four straps 8 corresponding to the sleeves 9, a pair of support plate parts 10, 10, which protrude toward the sleeves 9 in the axial direction of the lattice space 7 and are spaced apart from each other, are formed, respectively. . The support Nj plate parts 10, 10 are the third
As shown in the figure, it has a trapezoidal shape, and includes a triangular base 11 that projects from the edge of the strap 8 toward the sleeve 9 in the axial direction, and four parts of the base H that are paired with the base II. A fixing plate portion 12 extends along the outer periphery of the sleeve 9. As shown in FIG. 2, the fixing plate portion 12 is formed in an arc shape with a radius of curvature larger than the radius of the sleeve 9, and the side portion 12a facing the extension direction is located along the line 111 of the lattice windows u, i'I7. It is formed so that it is parallel to.
また、固着板部１２は、スリーブ９の半径方向外方にや
や開くように形成されるとともに、半径方向に向って弾
性変形ができるように形成されている。Further, the fixing plate portion 12 is formed to open slightly outward in the radial direction of the sleeve 9, and is also formed to be elastically deformable in the radial direction.
そして、各固着板部１２・・・の側部１２ａ・・・に内
接する円は、スリーブ９の直径よりも若干小径となって
おり、スリーブ９を支持板部１０・・・の間に配置した
際に、側部１２ａ・・・がスリーブ９の外壁部に押され
、これによって固着板部１２・・・が半径方向外方に若
干開くようになっている。The circle inscribed in the side portion 12a of each fixed plate portion 12 has a slightly smaller diameter than the diameter of the sleeve 9, and the sleeve 9 is arranged between the support plate portions 10. At this time, the side portions 12a are pressed against the outer wall portion of the sleeve 9, thereby causing the fixing plate portions 12 to open slightly outward in the radial direction.
以上の構成からなる支持格子にあっては、各固着板部１
２を、それらの側部１２ａに内接する円がスリーブ９の
直径よりも若干小径となるように形成しているので、ス
トラップ８同士の間隔のばらつきにより、スリーブ９の
外壁面と支持板部１２との間に隙間が生じた場合でも、
固着板部１２の側部１２ａをスリーブ９の外壁部と接触
させることができ、したがって、両者を強固に溶接固着
することができる。In the support grid having the above configuration, each fixing plate part 1
2 are formed so that the circle inscribed in their side portions 12a has a slightly smaller diameter than the diameter of the sleeve 9. Therefore, due to variations in the spacing between the straps 8, the outer wall surface of the sleeve 9 and the support plate portion 12 Even if there is a gap between
The side portion 12a of the fixing plate portion 12 can be brought into contact with the outer wall portion of the sleeve 9, and therefore both can be firmly welded and fixed.
また、第４図および第５図はそれぞれ本発明のさらに他
の実施例を示す図である。Further, FIGS. 4 and 5 are diagrams showing still other embodiments of the present invention, respectively.
第４図に示す支持格子は、支持板部１３をストラップ８
の縁部から軸線方向スリーブ９側に突出する三角形状の
基部ｌ鳴・１４と、一方の基部１４の縁部１４ａのスリ
ーブ９側の端部から他方の基部１４の縁部１４ａに至る
固着板部１５とによって構成し、固着板部１５を曲率半
径がスリーブ９の半径よりも大きな円弧状に形成すると
と乙に、各固着板部１５のスリーブ９側を向く面の中央
部に内接する円がスリーブ９の直径よりら若干小径とな
るように形成したものであり、上記実施例と同様の効果
が得られるのはムちろんのこと、スリーブ９の外壁面と
固着板部１５の軸線方向の側部だけでなく、スリーブ９
の外壁面と基部１４の縁部１．４ ａも溶接固着するこ
とができるので、溶接長をより長くすることができ、両
者をさらに強固に固着することができるものである。The support grid shown in FIG.
A triangular base 14 protrudes from the edge of the sleeve 9 in the axial direction, and a fixing plate extending from the edge 14a of one base 14 on the sleeve 9 side to the edge 14a of the other base 14. If the fixing plate part 15 is formed into an arc shape with a radius of curvature larger than the radius of the sleeve 9, a circle inscribed in the center of the surface of each fixing plate part 15 facing the sleeve 9 side. is formed to have a slightly smaller diameter than the diameter of the sleeve 9, and of course the same effect as the above embodiment can be obtained. As well as the sides of the sleeve 9
Since the outer wall surface and the edge 1.4a of the base 14 can also be fixed by welding, the welding length can be made longer and both can be fixed even more firmly.
また、第５図に示す支持格子は、第４図に示すと同様の
支持板部１６の基部Ｉ４に、これと対をなす基部１４側
の側部からスリーブ９の外周に沿って延出する固着板部
１７を形成して溝成し、固着板部１７をスリーブ９の半
径よりも大きな曲率半径の円弧状に形成し、延出方向を
向く側部１７ａを軸線に平行になるように形成し、スリ
ーブ９の半径方向外方にやや開くように形成するととも
に、各固着板部１７・・・の側部１７ａに内接する円が
スリーブ９の直径より若干小径になるように形成したも
のであり、上記の実施例と同様の効果を奏するものであ
る。Further, the support grid shown in FIG. 5 extends along the outer periphery of the sleeve 9 from the side of the base 14 that is paired with the base I4 of the support plate portion 16 similar to that shown in FIG. The fixing plate part 17 is formed into a groove, the fixing plate part 17 is formed in an arc shape with a radius of curvature larger than the radius of the sleeve 9, and the side part 17a facing the extension direction is formed so as to be parallel to the axis. The sleeve 9 is formed to open slightly outward in the radial direction, and the circle inscribed in the side portion 17a of each fixed plate portion 17 is formed to have a slightly smaller diameter than the diameter of the sleeve 9. This embodiment has the same effect as the above embodiment.
なお、上記実施例では、いずれも固着板部を円弧状に形
成しているが、それに限るものではなく、たとえば第１
図に示す実施例において、固着板部を平坦に形成し、そ
の延出方向先端部をスリーブ側へ均一に屈曲さＵ・でも
同様の効果を得ることができる。In the above embodiments, the fixing plate part is formed in an arc shape, but the fixing plate part is not limited to this.
In the embodiment shown in the figure, the same effect can be obtained even if the fixing plate is formed flat and the distal end in the extending direction is bent uniformly toward the sleeve.
［発明の効果］
以上説明したようにこの発明の支持格子は、スリーブを
固着するための支持板部のこれと対をなす支持板部側の
側部に、スリーブの外周に沿って延出する固着板部を、
各固着板部のスリーブ側を向く面の延出方向先端部に内
接する円が上記スリーブの直径よりら若干小径となるよ
うに形成しているので、ストラップの間隔にばらつきが
ある場合においても、スリーブの外壁面と支持板部との
間に隙間が発生することがなく、しだ力くって、スＩＪ
−ブとｆ持坂部とを強固に溶接固着すること力（でき、
格子とスリーブとの離脱による燃料集合体の分解等の事
故を未然に防止することができるという効果が得られる
。[Effects of the Invention] As explained above, the support lattice of the present invention extends along the outer periphery of the sleeve on the side of the support plate portion that is paired with the support plate portion for fixing the sleeve. Fixing plate part,
The circle inscribed in the tip of the extending direction of the surface facing the sleeve of each fixing plate is formed to have a slightly smaller diameter than the sleeve diameter, so even if there are variations in the strap spacing, There is no gap between the outer wall surface of the sleeve and the support plate, and the IJ
- Force to securely weld and fix the bulge and the sloping part of the
This has the effect that accidents such as disassembly of the fuel assembly due to separation of the grate and the sleeve can be prevented.
第１図ないし第３図は本発明の一実施例を示す図であっ
て、第１図は支持格子のスリーブ部分を示す斜視図、第
２図は第１図の■方向矢視図、第３図は猶２図の■方向
矢視図、第４図および第５図はそれぞれ本発明のその他
の実施例を示す図であって、支持格子のスリーブ部分を
示す斜視図、第６図および第７図は従来の支持格子の一
例を示す図であって、第６図は支持格子を示す斜視図、
第７図はそのスリーブ部分を示ず斜視図である。1 to 3 are views showing one embodiment of the present invention, in which FIG. 1 is a perspective view showing the sleeve portion of the support grid, FIG. FIG. 3 is a view taken in the direction of arrow 2 in FIG. FIG. 7 is a diagram showing an example of a conventional support grid, and FIG. 6 is a perspective view showing the support grid;
FIG. 7 is a perspective view without showing the sleeve portion.
Claims (1)
いに垂直に交差させて組み立てられた格子と、格子空間
の対辺距離とほぼ同じ内径を有し、上記格子空間のいず
れかと軸線を一致させてその格子に固定されたスリーブ
とからなり、上記格子空間を画成する４枚のストラップ
の格子空間部分における軸線方向縁部には、格子空間の
軸線方向に突出し、かつ、互いに離間した一対の支持板
部がそれぞれ形成され、これら支持板部の間に上記スリ
ーブが配置されるとともに、各支持板部とスリーブとが
互いに固着されてなる支持格子において、上記支持板部
のこれと対をなす支持板部側の側部に、上記スリーブの
外周に沿って延出する固着板部を、各固着板部のスリー
ブ側を向く面の延出方向先端部に内接する円が上記スリ
ーブの直径よりも若干小径となるように形成したことを
特徴とする支持格子。A lattice assembled by crossing a plurality of straps perpendicularly to each other so as to define a large number of lattice spaces, and a lattice having an inner diameter approximately equal to the distance across opposite sides of the lattice spaces, and having an axis aligned with one of the above-mentioned lattice spaces. A sleeve fixed to the lattice, and a pair of supports projecting in the axial direction of the lattice space and spaced apart from each other are provided at the axial edges of the lattice space portion of the four straps that define the lattice space. In a support lattice in which plate portions are formed, the sleeve is disposed between these support plate portions, and each support plate portion and the sleeve are fixed to each other, a paired support of the support plate portion is provided. A fixing plate extending along the outer periphery of the sleeve is placed on the side of the plate so that a circle inscribed in the tip of the surface facing the sleeve in the extending direction is larger than the diameter of the sleeve. A support grid characterized by being formed to have a slightly smaller diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61016347A JPH07119819B2 (en) | 1986-01-28 | 1986-01-28 | Support grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61016347A JPH07119819B2 (en) | 1986-01-28 | 1986-01-28 | Support grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62174686A true JPS62174686A (en) | 1987-07-31 |
| JPH07119819B2 JPH07119819B2 (en) | 1995-12-20 |
Family
ID=11913840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61016347A Expired - Lifetime JPH07119819B2 (en) | 1986-01-28 | 1986-01-28 | Support grid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07119819B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5239092A (en) * | 1975-09-20 | 1977-03-26 | Nuclear Fuel Ind Ltd | Nuclear fuel assembly |
-
1986
- 1986-01-28 JP JP61016347A patent/JPH07119819B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5239092A (en) * | 1975-09-20 | 1977-03-26 | Nuclear Fuel Ind Ltd | Nuclear fuel assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07119819B2 (en) | 1995-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |