JPH035913Y2 - - Google Patents
Info
- Publication number
- JPH035913Y2 JPH035913Y2 JP1984191419U JP19141984U JPH035913Y2 JP H035913 Y2 JPH035913 Y2 JP H035913Y2 JP 1984191419 U JP1984191419 U JP 1984191419U JP 19141984 U JP19141984 U JP 19141984U JP H035913 Y2 JPH035913 Y2 JP H035913Y2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- pin
- shroud
- lower plate
- fixing device
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- Supports For Plants (AREA)
- Connection Of Plates (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
本考案は上部格子板をシユラウド内周に固定す
る上部格子板固定装置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an upper lattice plate fixing device for fixing an upper lattice plate to the inner periphery of a shroud.
一般に、沸騰水型原子炉では、原子炉圧力容器
内にシユラウドが配置され、このシユラウドには
上部格子板が固定されている。
Generally, in a boiling water reactor, a shroud is disposed within the reactor pressure vessel, and an upper grate plate is fixed to the shroud.
第２図および第３図は上部格子板のシユラウド
への取付け部を示すもので、図において符号１は
上部格子板を示しており、この上部格子板１は上
板２と下板３との間に格子状にグリツドプレート
４を配置するとともに、上板２と下板３との間の
外周に沿つてリム胴５を配置して構成されてい
る。 Figures 2 and 3 show the attachment part of the upper lattice plate to the shroud. In the figures, reference numeral 1 indicates the upper lattice plate, and this upper lattice plate 1 is connected to the upper plate 2 and the lower plate 3. A grid plate 4 is arranged between them in a grid pattern, and a rim cylinder 5 is arranged along the outer periphery between the upper plate 2 and the lower plate 3.
原子炉圧力容器内に配置されるシユラウド６の
大径段部７には、一定間隔をおいて複数の固定ブ
ロツク８が配置されている。図において符号９は
上部格子板１と固定ブロツク８とを接合する偏心
ピンを示しており、この偏心ピン９は偏心して配
置される上部ピン部１０と下部ピン部１１とから
構成されている。上部ピン部１０は下板３に穿設
される貫通孔内に上端部が突出する位置まで挿入
され、上部格子板１の下板３に溶接されている。 A plurality of fixing blocks 8 are arranged at regular intervals on a large-diameter stepped portion 7 of a shroud 6 arranged in a reactor pressure vessel. In the figure, reference numeral 9 indicates an eccentric pin that connects the upper grid plate 1 and the fixing block 8, and the eccentric pin 9 is composed of an upper pin portion 10 and a lower pin portion 11 that are eccentrically arranged. The upper pin part 10 is inserted into a through hole formed in the lower plate 3 to a position where the upper end protrudes, and is welded to the lower plate 3 of the upper lattice plate 1.
一方、下部ピン部１１はグリツドプレート４の
内周側に形成される切欠溝からなる凹溝内に挿入
されている。 On the other hand, the lower pin portion 11 is inserted into a groove formed on the inner peripheral side of the grid plate 4, which is a notched groove.
このように上部格子板１の固定ブロツク８への
取付けを偏心ピン９を用いて行なうことにより、
下板３に形成される貫通孔と固定ブロツク８に形
成される凹溝との位置にずれがあつても偏心ピン
９を回転させることにより上部格子板１をシユラ
ウド６内の所定の位置に固定することが可能とな
る。 By attaching the upper grid plate 1 to the fixing block 8 using the eccentric pins 9 in this way,
Even if there is a misalignment between the through hole formed in the lower plate 3 and the groove formed in the fixing block 8, the upper lattice plate 1 can be fixed at a predetermined position in the shroud 6 by rotating the eccentric pin 9. It becomes possible to do so.
しかしながら、このような上部格子板固定装置
では、偏心ピン９の回転方向の位置は実際に上部
格子板１をシユラウド６内に据付けてみないと正
確に知ることができず、従つて上部格子板１を固
定ブロツク８に据付けた状態で偏心ピン９を溶接
するのが望ましい。 However, in such an upper grid plate fixing device, the position of the eccentric pin 9 in the rotational direction cannot be accurately known unless the upper grid plate 1 is actually installed in the shroud 6. It is preferable to weld the eccentric pin 9 while the pin 1 is installed on the fixed block 8.
しかしながら、従来の上部格子板固定装置で
は、偏心ピン９の下板３への溶接は上部格子板１
のリム胴５とシユラウドの間の上方にコアスプレ
イスパージヤ１２が配置されているため、その接
近性の点から困難であり、リム胴５の内側から溶
接を行なう必要があるが、従来、偏心ピン９の上
端が下板３の貫通孔から相当長さ突出しているた
め、偏心ピン９のうちリム胴５の内側から死角と
なる偏心ピン９のシユラウド６側面を溶接するこ
とが困難であつた。 However, in the conventional upper grid plate fixing device, the eccentric pin 9 is welded to the lower plate 3 of the upper grid plate 1.
Since the core spray spargeer 12 is located above between the rim shell 5 and the shroud, it is difficult to access the core spray spargeer 12, and it is necessary to perform welding from the inside of the rim shell 5. Since the upper end of the pin 9 protrudes a considerable length from the through hole of the lower plate 3, it was difficult to weld the side surface of the shroud 6 of the eccentric pin 9, which is a blind spot from the inside of the rim body 5. .
従つて、従来、上部格子板１のシユラウド６へ
の仮据付けを行ない、偏心ピン９の角度方向の位
置決めを行ない、この状態で仮止め溶接を行な
い、上部格子板１を所定の作業フロアに移動させ
た後、本溶接を行なうという手順がとられてい
る。 Therefore, conventionally, the upper grid plate 1 is temporarily installed on the shroud 6, the eccentric pin 9 is positioned in the angular direction, temporary welding is performed in this state, and the upper grid plate 1 is moved to a predetermined work floor. The procedure is to carry out the final welding after the welding has been completed.
また、上部格子板１への偏心ピン９の溶接の際
の変形によりシユラウド６内に収容された上部格
子板１の偏心ピン９が固定ブロツク８の凹溝に干
渉するときには、再度上部格子板１を作業フロア
に戻し、偏心ピン９の干渉部分を削りとる必要が
ある。 Furthermore, when the eccentric pins 9 of the upper grid plate 1 accommodated in the shroud 6 interfere with the grooves of the fixed block 8 due to deformation during welding of the eccentric pins 9 to the upper grid plate 1, the upper grid plate 1 It is necessary to return it to the work floor and scrape off the interfering part of the eccentric pin 9.
このように、従来、偏心ピン９の上部格子板１
への溶接は、上部格子板１をシユラウド６に据付
けた状態で行なうことが困難であり、上部格子板
１のシユラウド６内と作業フロア間の移動を繰り
返す必要があり、据付け日数が非常に長くなると
いう問題があつた。 In this way, conventionally, the upper lattice plate 1 of the eccentric pin 9
It is difficult to weld the upper grid plate 1 to the shroud 6 with the upper grid plate 1 installed in the shroud 6, and it is necessary to repeatedly move the upper grid plate 1 between the shroud 6 and the work floor, which takes a very long time for installation. There was a problem.
本考案はかかる従来の事情に対処してなされた
もので、シユラウド内で偏心ピンの上部格子板へ
の溶接を確実に行なうことができ、上部格子板の
シユラウドへの据付けを短期間で完了することの
できる上部格子板固定装置を提供しようとするも
のである。
The present invention was developed in response to such conventional circumstances, and it is possible to reliably weld the eccentric pin to the upper lattice plate within the shroud, and the installation of the upper lattice plate to the shroud can be completed in a short period of time. The present invention aims to provide an upper lattice plate fixing device that can be used for fixing an upper lattice plate.
すなわち本考案は、上板と下板との間に格子状
にグリツドプレートを配置し、前記上板と下板と
の間の外周に沿つてリム胴を配置してなる上部格
子板と、シユラウド内周に沿つて配置される固定
ブロツクと、偏心して配置される上部ピン部と下
部ピン部とからなり、前記上部ピン部を前記下板
に穿設される貫通孔内に挿入され前記下部ピン部
を前記固定ブロツクに形成される凹溝内に挿入さ
れる偏心ピンとを備えた上部格子板固定装置おい
て、前記上部ピン部の高さを前記下板の板厚とほ
ぼ同じ高さとするとともに、前記上部ピン部上端
部または前記下板の貫通孔上端部に面取り部を形
成し、この面取り部を開先として前記上部ピン部
と下板とを溶接したことを特徴とする上部格子板
固定装置である。
That is, the present invention includes an upper grid plate in which a grid plate is arranged in a grid pattern between an upper plate and a lower plate, and a rim cylinder is arranged along the outer periphery between the upper plate and the lower plate; It consists of a fixing block arranged along the inner circumference of the shroud, and an upper pin part and a lower pin part arranged eccentrically, and the upper pin part is inserted into a through hole drilled in the lower plate, and the lower part In the upper lattice plate fixing device, the upper lattice plate fixing device includes a pin portion and an eccentric pin inserted into a groove formed in the fixing block, wherein the height of the upper pin portion is approximately the same height as the thickness of the lower plate. In addition, a chamfered portion is formed at the upper end of the upper pin portion or the upper end of the through hole of the lower plate, and the upper pin portion and the lower plate are welded using the chamfered portion as a groove. It is a fixed device.
以下本考案の詳細を図面に示す一実施例につい
て説明する。
The details of the present invention will be described below with reference to an embodiment shown in the drawings.
第１図は本考案の上部格子板固定装置の一実施
例を示すもので、この実施例では偏心ピン９の上
部ピン部１０の高さが下板３の板厚とほぼ同じ高
さとされている。また、上部ピン部１０の上端部
および下板３の貫通孔上端部には面取り部１３が
形成され、これらの面取り部１３を開先として上
部ピン部１０と下板３上面とが溶接されている。 FIG. 1 shows an embodiment of the upper lattice plate fixing device of the present invention. In this embodiment, the height of the upper pin portion 10 of the eccentric pin 9 is approximately the same height as the thickness of the lower plate 3. There is. Further, a chamfered portion 13 is formed at the upper end of the upper pin portion 10 and the upper end of the through hole of the lower plate 3, and the upper pin portion 10 and the upper surface of the lower plate 3 are welded using the grooves of these chamfered portions 13. There is.
以上のように構成された上部格子板固定装置で
は、従来の上部格子板固定装置のように偏心ピン
９の上部ピン部１０の上端が下板３の上面から突
出していないため、リム胴５の内側からの上部ピ
ン部１０の溶接時に上部ピン部１０の突出部が死
角となることはなく、上部ピン部１０の上端部全
外周にわたり、下板３上面への溶接を上部格子板
１をシユラウド６に据付けた状態で確実に行なう
ことができる。 In the upper lattice plate fixing device configured as described above, unlike the conventional upper lattice plate fixing device, the upper end of the upper pin portion 10 of the eccentric pin 9 does not protrude from the upper surface of the lower plate 3. When welding the upper pin part 10 from the inside, the protruding part of the upper pin part 10 does not become a blind spot, and the welding to the upper surface of the lower plate 3 is performed over the entire outer circumference of the upper end of the upper pin part 10, while the upper grid plate 1 is shrouded. This can be done reliably with the machine installed at 6.
また、上部ピン部１０の上端部および下板３の
貫通孔上端部に面取り部１３を形成し、この面取
り部１３を開先としたので、さらに容易に溶接を
行なうことができる。 Further, since a chamfered portion 13 is formed at the upper end of the upper pin portion 10 and the upper end of the through hole of the lower plate 3, and the chamfered portion 13 is used as a groove, welding can be performed more easily.
以上述べたように本考案の上部格子板固定装置
では、上部ピン部の高さを下板の板厚とほぼ同じ
高さにしたので、上部格子板をシユラウドに据付
けた状態で本溶接を行なうことができる。これに
より上部格子板のシユラウドへの据付けを従来よ
り短期間で行なうことが可能となる。
As mentioned above, in the upper lattice plate fixing device of the present invention, the height of the upper pin part is made almost the same as the thickness of the lower plate, so the main welding is performed with the upper lattice plate installed in the shroud. be able to. This makes it possible to install the upper grid plate on the shroud in a shorter period of time than in the past.
さらに上部ピン部上端部または下板の貫通孔上
端部に面取り部を形成し、この面取り部を開先と
して上部ピン部と下板とを溶接したので、溶接強
度を従来より大幅に向上することができる。 Furthermore, a chamfered portion is formed at the upper end of the upper pin portion or the upper end of the through hole in the lower plate, and this chamfered portion is used as a groove to weld the upper pin portion and the lower plate, so welding strength is significantly improved compared to conventional methods. I can do it.
第１図は本考案の上部格子板固定装置の一実施
例を示す縦断面図、第２図は従来の上部格子板固
定装置を示す縦断面図、第３図は第２図の−
線に沿う横断面図である。
１……上部格子板、２……上板、３……下板、
４……グリツドプレート、５……リム胴、８……
固定ブロツク、９……偏心ピン、１０……上部ピ
ン部、１１……下部ピン部。
FIG. 1 is a longitudinal sectional view showing an embodiment of the upper lattice plate fixing device of the present invention, FIG. 2 is a longitudinal sectional view showing a conventional upper lattice plate fixing device, and FIG.
FIG. 1... Upper grid plate, 2... Upper plate, 3... Lower plate,
4... Grid plate, 5... Rim body, 8...
Fixed block, 9... Eccentric pin, 10... Upper pin part, 11... Lower pin part.
Claims (1)
を配置し、前記上板と下板との間の外周に沿つて
リム胴を配置してなる上部格子板と、シユラウド
内周に沿つて配置される固定ブロツクと、偏心し
て配置される上部ピン部と下部ピン部とからなり
前記上部ピン部を前記下板に穿設される貫通孔内
に挿入され前記下部ピン部を前記固定ブロツクに
形成される凹溝内に挿入される偏心ピンとを備え
た上部格子板固定装置おいて、前記上部ピン部の
高さを前記下板の板厚とほぼ同じ高さとするとと
もに、前記上部ピン部上端部または前記下板の貫
通孔上端部に面取り部を形成し、この面取り部を
開先として前記上部ピン部と下板とを溶接したこ
とを特徴とする上部格子板固定装置。 A grid plate is arranged in a grid pattern between the upper plate and the lower plate, and a rim body is arranged along the outer periphery between the upper plate and the lower plate, and an upper lattice plate is arranged along the inner periphery of the shroud. The fixing block is arranged horizontally, and an upper pin part and a lower pin part are arranged eccentrically. In the upper lattice plate fixing device, the upper lattice plate fixing device includes an eccentric pin inserted into a groove formed in the upper lattice plate. An upper lattice plate fixing device characterized in that a chamfered portion is formed at the upper end or the upper end of the through hole of the lower plate, and the upper pin portion and the lower plate are welded using the chamfered portion as a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984191419U JPH035913Y2 (en) | 1984-12-19 | 1984-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984191419U JPH035913Y2 (en) | 1984-12-19 | 1984-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61105894U JPS61105894U (en) | 1986-07-05 |
| JPH035913Y2 true JPH035913Y2 (en) | 1991-02-14 |
Family
ID=30748858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984191419U Expired JPH035913Y2 (en) | 1984-12-19 | 1984-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH035913Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4707217B2 (en) * | 2000-08-09 | 2011-06-22 | 東京電力株式会社 | Boiling water reactor |
-
1984
- 1984-12-19 JP JP1984191419U patent/JPH035913Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61105894U (en) | 1986-07-05 |
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