JPS5836396U

JPS5836396U - Reactor shroud head tightening device

Info

Publication number: JPS5836396U
Application number: JP1981131218U
Authority: JP
Inventors: 裕一元良; 毅中嶋
Original assignee: 株式会社東芝
Priority date: 1981-09-03
Filing date: 1981-09-03
Publication date: 1983-03-09

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

[Brief explanation of the drawing]

第１図ないし第３図は従来例を示し、第１図は従来例の
締付装置の断面図、第２図は締付ナツト部分を一部断面
で示す側面図、第３図は同締付ナツト部分の平面図。第
４図ないし第６図はこの考案の一実施例を示し、第４図
は原子炉の一部の断面図、第５図は締付装置の側面図、
第６図は第５図中のＶｌ−ＶＩ線に沿う断面図。第７図
および第８図はそれぞれ締付ナツトの変形例を示す断面
図、第９図は締付ナツトの他の変形例を示す底面図であ
る。３・・・・・・シュラウドヘッド、１０・・・・・・締
付装置、１４・・・・・・ボルト体、１５・・・・・・
ねじ部、１６・・・・・・締付部、１８・・・・・・締
付ナツト、１９・・・・・・ねじ部。Figures 1 to 3 show conventional examples. Figure 1 is a sectional view of the conventional tightening device, Figure 2 is a side view partially showing the tightening nut part, and Figure 3 is the same tightening device. A plan view of the nut portion. Figures 4 to 6 show an embodiment of this invention, with Figure 4 being a sectional view of a part of the reactor, Figure 5 being a side view of the tightening device,
FIG. 6 is a sectional view taken along the line Vl-VI in FIG. 5. 7 and 8 are sectional views showing a modification of the tightening nut, respectively, and FIG. 9 is a bottom view showing another modification of the tightening nut. 3...Shroud head, 10...Tightening device, 14...Bolt body, 15...
Threaded part, 16... Tightening part, 18... Tightening nut, 19... Threaded part.

Claims

[Scope of utility model registration request]

(1) A sleeve body with both upper and lower ends open, and a bolt that passes through the sleeve body so as to be movable in the axial direction, has a threaded part at the upper end, and has a tightening part for tightening the shroud head at the lower end. and a tightening nut that is screwed into the threaded portion of the bolt body, and the tightening nut and the threaded portion of the bolt body have a lead angle with a finer ratio of pitch to diameter than a coarse thread. A tightening device for a shroud head in a nuclear reactor, characterized by using small, fine threaded screws.

(2) The nuclear reactor shroud according to claim 1, wherein the tightening nut has a large diameter opening formed by boring the inner surface of the lower end opening thereof. Head tightening device.

(3) The tightening nut has a tapered fitting portion at its lower end, and this tapered fitting portion is inserted into the tapered receiving hole formed at the upper end of the sleeve body. A tightening device for a shroud head in a nuclear reactor according to claim 1 of the claimed utility model registration, characterized in that: