JPS60139106U

JPS60139106U - steam generation tube

Info

Publication number: JPS60139106U
Application number: JP2243584U
Authority: JP
Inventors: 諸岡　隆吉; 堅三郎竹添; 松尾　篤二
Original assignee: 三菱重工業株式会社
Priority date: 1984-02-21
Filing date: 1984-02-21
Publication date: 1985-09-14

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図は従来のらせん状溝を有する蒸気発生管の外観図
、第２図は第１図の■−■線矢視の縦断面図、第３図は
第２図の■−■線矢視の横断面図、第４図はらせん状溝
を有する管の内面温度を流体の保有熱量を表わす流体エ
ンタルピに対して示した図表、第５図は従来の他のらせ
ん状溝を有する蒸気発生管の縦断面図、第６図は第５図
の■−ＶＩ線矢視の横断面図、第７図は第５図の■−■
線矢視の横断面図、第８図は本考案に係わる蒸気発生管
内壁の管接合部と、その近傍のらせん状溝とつば部の状
況を示す一部破断の断面図、第９図は第８図のＩＸ−Ｉ
Ｘ線矢視のらせん状つば部をらせんピッチ角に沿って展
開した一部破断の断面図である。４１Ａ、４１Ｂ・・・管、４２Ａ、４２Ｂ・・・らせん
状溝、４３Ａ、４３Ｂ・・・らせん状つば部、４４Ａ、
４４Ｂ・・・内壁、５０・・・接合部。Figure 1 is an external view of a conventional steam generation tube with spiral grooves, Figure 2 is a vertical cross-sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a vertical cross-sectional view taken along the line ■-■ in Figure 2. Figure 4 is a diagram showing the inner surface temperature of a pipe with spiral grooves versus fluid enthalpy representing the amount of heat retained by the fluid. Figure 5 is a diagram showing another conventional steam generator with spiral grooves. A vertical cross-sectional view of the pipe, Fig. 6 is a cross-sectional view taken along the line ■-VI in Fig. 5, and Fig. 7 is a cross-sectional view taken from ■-■ in Fig. 5.
FIG. 8 is a cross-sectional view taken along the line, and FIG. 8 is a partially cutaway cross-sectional view showing the tube joint of the inner wall of the steam generating tube according to the present invention, as well as the spiral groove and collar in the vicinity thereof. IX-I in Figure 8
FIG. 3 is a partially broken cross-sectional view of the spiral collar portion developed along the helical pitch angle as viewed from the X-ray arrow. 41A, 41B...Pipe, 42A, 42B...Spiral groove, 43A, 43B...Spiral collar, 44A,
44B...Inner wall, 50...Joint part.

Claims

[Scope of utility model registration request]

A steam generating tube that is heated from the outside of the tube, an evaporable fluid passes through the inside of the tube, and the number of spiral grooves carved on the inner surface of the tube changes stepwise in the tube axis direction, Near a joint where the number of spiral grooves carved on the inner surface of the tube changes stepwise in the tube axis direction, the spiral ribs on the sides of each spiral groove are gradually reduced toward the joint. - A steam generating tube characterized in that the inner wall surface of the tube at the joint portion is formed flush.