JPS643159U

JPS643159U -

Info

Publication number: JPS643159U
Application number: JP9737087U
Authority: JP
Priority date: 1987-06-26
Filing date: 1987-06-26
Publication date: 1989-01-10
Also published as: JPH0355008Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示した縦断面図、
第２図は第１図の部分拡大断面図、第３図乃至第
５図は本考案の他の実施例を示した部分拡大断面
図、第６図及び第７図は従来のプレス加工による
バタフライ弁の例を示す縦断面図である。１……弁箱、２……流路、３……弁棒、４……
弁体、５……内筒、５ａ……内筒の端周、６……
外筒、６ａ……外筒の円筒部、６ｂ……外筒のガ
スケツト収容部、６ｃ……ガスケツト収容部の内
周。 FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
Fig. 2 is a partially enlarged sectional view of Fig. 1, Figs. 3 to 5 are partially enlarged sectional views showing other embodiments of the present invention, and Figs. FIG. 3 is a longitudinal cross-sectional view showing an example of a valve. 1... Valve box, 2... Channel, 3... Valve stem, 4...
Valve body, 5... Inner cylinder, 5a... End circumference of inner cylinder, 6...
Outer cylinder, 6a... Cylindrical part of the outer cylinder, 6b... Gasket accommodating part of the outer cylinder, 6c... Inner periphery of the gasket accommodating part.

Claims

[Claims for Utility Model Registration] (1) An annular valve body, a valve stem that diametrically passes through the flow path in the center of the valve body, and a valve stem that is fixed to the valve stem and rotates approximately 90 degrees. In a butterfly valve consisting of a substantially disc-shaped valve body that opens and closes the flow path by moving, the valve box is composed of an inner cylinder and an outer cylinder, the inner cylinder is approximately cylindrical, and the valve body is composed of an inner cylinder and an outer cylinder. The outer cylinder has a substantially cylindrical cylindrical part having approximately the same length and the same length as the inner cylinder which is fitted concentrically with the outer cylinder, and a C-shaped cross section with a concave side facing from both ends of the cylindrical part to the end circumference of the inner cylinder. 1. A butterfly valve comprising a pair of annular gasket accommodating parts, the inner periphery of each of the gasket accommodating parts being closely fixed to the end periphery of each of the inner cylinders. (2) The butterfly valve according to claim 1, wherein the inner periphery of the gasket accommodating portion of the outer cylinder and the end periphery of the inner cylinder are overlapped and fixed. (3) The butterfly valve according to claim 1, wherein the end periphery of the inner cylinder is folded back and the inner periphery of the gasket accommodating portion of the outer cylinder is inserted and fixed therein. (4) The butterfly valve according to claim 1, wherein the inner periphery of the gasket accommodating portion of the outer cylinder is folded back and the end periphery of the inner cylinder is inserted and fixed therein. (5) The butterfly valve according to claim 1, wherein the material of the outer cylinder is different from the material of the inner cylinder.