JPS6291094U

JPS6291094U -

Info

Publication number: JPS6291094U
Application number: JP18296485U
Authority: JP
Priority date: 1985-11-29
Filing date: 1985-11-29
Publication date: 1987-06-10

Description

[Brief explanation of the drawing]

第１図は本考案に係る真空シール装置の一実施
例を示す断面図、第２図は同真空シール装置によ
る真空保持状態を示す断面図、第３図は従来例に
係る真空引き装置を示す断面図、第４図は第３図
の要部を取出して示す断面図、第５図は従来の真
空状態保持構造を示す断面図、第６図は従来の他
の真空状態保持構造を示す断面図である。２２……外管、２３……貫通孔、２４……弁箱
、２５……螺合部、２６……弁座部、２７……弁
体、２８……シール部、２９……連通孔。 Fig. 1 is a sectional view showing an embodiment of the vacuum sealing device according to the present invention, Fig. 2 is a sectional view showing the vacuum holding state by the same vacuum sealing device, and Fig. 3 is a sectional view showing a vacuum evacuation device according to a conventional example. 4 is a sectional view showing the main part of FIG. 3, FIG. 5 is a sectional view showing a conventional vacuum state holding structure, and FIG. 6 is a sectional view showing another conventional vacuum state holding structure. It is a diagram. 22... Outer tube, 23... Through hole, 24... Valve box, 25... Screwing part, 26... Valve seat part, 27... Valve body, 28... Seal part, 29... Communication hole.

Claims

[Scope of utility model registration request]

A vacuum sealing device for a tube that can form a vacuum state in the internal space of the pipe and maintains the vacuum state, comprising: a valve box fixed to a through hole provided in a pipe wall and including a threaded portion and a valve seat portion; A communication hole that is screwed into the threaded part of the valve box and includes a seal part that can be brought into close contact with the valve seat part of the valve box, and that communicates between the inside and outside of the pipe when the seal part is separated from the valve seat part. 1. A vacuum sealing device for a pipe, comprising: a valve body;