JPH01143471U

JPH01143471U -

Info

Publication number: JPH01143471U
Application number: JP3970688U
Authority: JP
Priority date: 1988-03-28
Filing date: 1988-03-28
Publication date: 1989-10-02

Description

[Brief explanation of the drawing]

第１図は本考案のバタフライバルブの一実施例
を示す縦断面図、第２図は第１図に示したバタフ
ライバルブの下方部分を拡大して示す拡大部分縦
断面図であり、第３図及び第４図は夫々従来のバ
タフライバルブにおける下部軸受部の構造を示す
部分縦断面図である。１……ボデー、２……下方の軸孔、３……円形
段部、４……鍔付き有底ブツシユ、５……円形鍔
、６……底部、７……ステム。 FIG. 1 is a vertical cross-sectional view showing an embodiment of the butterfly valve of the present invention, FIG. 2 is an enlarged partial vertical cross-sectional view showing the lower part of the butterfly valve shown in FIG. 1, and FIG. and FIG. 4 are partial longitudinal cross-sectional views showing the structure of the lower bearing portion in a conventional butterfly valve. DESCRIPTION OF SYMBOLS 1...Body, 2...Lower shaft hole, 3...Circular step, 4...Flammed and bottomed bush, 5...Circular collar, 6...Bottom, 7...Stem.

Claims

[Claims for Utility Model Registration] (1) The lower shaft hole of the body is a stepped hole having a circular step on the inside in the radial direction of the body, and a cylindrical hole having a circular flange at one end and a bottom at the other end. A butterfly in which a bottomed bushing with a flange is inserted into the shaft hole by fitting the circular flange of the bushing into the circular step of the shaft hole, and supporting the lower part of the stem with the bottomed bushing with flange. valve. (2) The butterfly valve according to claim 1, wherein the butterfly valve is a central butterfly valve. (3) The butterfly valve according to claim 1 or 2, wherein the flanged and bottomed bushing is made of synthetic resin.