JPH0320766U

JPH0320766U -

Info

Publication number: JPH0320766U
Application number: JP8086289U
Authority: JP
Priority date: 1989-07-11
Filing date: 1989-07-11
Publication date: 1991-02-28

Description

[Brief explanation of drawings]

第１図は、本考案を適用したボール弁の中央縦
断正面図、第２図は、第１図のＡ部拡大図、第３
図は、本考案を適用したボールの正面図、第４図
は、中実型ボールを備える従来のボール弁の一例
を示す中央縦断正面図、第５図は、従来の中空型
ボールの一例を示す中央縦断正面図、第６図は、
同じく他の例を示す中央縦断正面図、第７図は、
同じく更に他の例を示す中央縦断正面図である。１……弁箱、２……ボール、３……流路、４…
…環状シート、５……弁棒、６……グランドパツ
キン、７……キヤビテイ、８……連通孔、１１…
…ボール、１１ａ……球面図、１１ｂ……円筒部
、１１ｃ……中空部、１２……連通孔、２１……
ボール、２１ａ……球面部、２１ｂ……円筒部、
２１ｃ……突出部、２２……連通孔、３１……ボ
ール、３１ａ……球面部、３１ｂ……円筒部、３
２……連通孔、４１……ボール、４１ａ……球面
部、４１ｂ……円筒部、４１ｃ……中空部、４２
……連通路。 Fig. 1 is a central longitudinal sectional front view of a ball valve to which the present invention is applied, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 is an enlarged view of section A in Fig.
The figure is a front view of a ball to which the present invention is applied, FIG. 4 is a central longitudinal sectional front view showing an example of a conventional ball valve equipped with a solid ball, and FIG. 5 is an example of a conventional hollow ball. The center longitudinal sectional front view shown in Fig. 6 is as follows.
FIG. 7 is a central longitudinal sectional front view showing another example.
It is a central vertical sectional front view showing still another example. 1... Valve box, 2... Ball, 3... Channel, 4...
...Annular seat, 5...Valve stem, 6...Gland packing, 7...Cavity, 8...Communication hole, 11...
...Ball, 11a...Spherical view, 11b...Cylindrical part, 11c...Hollow part, 12...Communication hole, 21...
Ball, 21a...spherical part, 21b...cylindrical part,
21c...Protrusion part, 22...Communication hole, 31...Ball, 31a...Spherical part, 31b...Cylindrical part, 3
2...Communication hole, 41...Ball, 41a...Spherical part, 41b...Cylindrical part, 41c...Hollow part, 42
...Communication path.

Claims

[Scope of utility model registration request]

At the side end of the spherical part of the ball in the ball valve,
1. A device for preventing abnormal pressure rise in a cavity of a ball valve, characterized in that a communication path in the form of a shallow groove is provided between the annular seat and the cavity portion of the valve box and a fluid flow path.