JPS62172984U

JPS62172984U -

Info

Publication number: JPS62172984U
Application number: JP6071186U
Authority: JP
Priority date: 1986-04-22
Filing date: 1986-04-22
Publication date: 1987-11-02

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す断面図、第２図
は従来例を示す概略断面図、第３図は第２図のＡ
部拡大図、第４図は第３図のＢ―Ｂ矢視図である
。２０は内管板、２１は２重伝熱管、２２は嵌挿
孔、２３は下部スタブ部、２４は上部スタブ部、
２５は細孔、２６は外管、２７は内管、２８は空
隙を示す。 Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a schematic sectional view showing a conventional example, and Fig. 3 is A of Fig. 2.
The enlarged view of FIG. 4 is a view taken along the line B--B in FIG. 3. 20 is an inner tube plate, 21 is a double heat exchanger tube, 22 is a fitting hole, 23 is a lower stub portion, 24 is an upper stub portion,
25 is a pore, 26 is an outer tube, 27 is an inner tube, and 28 is a void.

Claims

[Scope of utility model registration request]

A double-pipe steam generator in which the heat transfer tube is a double tube, is inserted through and fixed to at least a tube plate defining a water chamber, liquid sodium is flowed outside the heat transfer tube, and water is flowed inside the heat transfer tube to generate steam. A stub portion is provided on both upper and lower surfaces of the double tube insertion hole of the inner tube plate, and the tip of the double tube inserted into the insertion hole is inserted into the outer tube over a required length. and expand the tip of the inner tube, weld the tip of the inner tube to the stub on the water chamber side and the other stub to the outer tube, and connect the inner tube through the hole drilled in the stub on the water chamber side. A tube end support structure for a double tube in a double heat exchanger tube steam generator, characterized in that a gap formed between the tube and the fitting hole is connected to a leak detection means.