JPH0189669U

JPH0189669U -

Info

Publication number: JPH0189669U
Application number: JP18445387U
Authority: JP
Priority date: 1987-12-04
Filing date: 1987-12-04
Publication date: 1989-06-13
Also published as: JPH0334523Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すバタフライ弁
の側面断面図、第２図Ａ及びＢは上部本体及び下
部本体の各正面断面図、第３図Ａ及びＢは同じく
上部本体及び下部本体の側面断面図、第４図はシ
ートリングの要部断面図、第５図Ａ及びＢは鍔付
環状アダプタの側面断面図及び要部拡大断面図、
第６図及び第７図は従来例の側面断面図及び正面
断面図である。１……上部本体、１１……内周面、１２……側
周面、１３……弁棒孔、１４……輪状突起、１５
……環状溝、１６……接合面、２……下部本体、
２６……接合面、３……シートリング、３１……
弁棒孔、３２……輪状溝、３３……円筒部、３４
……外縁、４……弁棒、５……弁体、６……鍔付
環状アダプタ、６１……環状溝、６４……鍔部、
６５……円筒部。 Figure 1 is a side sectional view of a butterfly valve showing an embodiment of the present invention, Figures 2 A and B are front sectional views of the upper and lower bodies, and Figures 3 A and B are the same upper and lower bodies. FIG. 4 is a sectional view of the main part of the seat ring, FIGS. 5A and B are a side sectional view and an enlarged sectional view of the main part of the flanged annular adapter,
6 and 7 are a side sectional view and a front sectional view of the conventional example. DESCRIPTION OF SYMBOLS 1... Upper main body, 11... Inner circumferential surface, 12... Side circumferential surface, 13... Valve stem hole, 14... Annular projection, 15
...Annular groove, 16...Joint surface, 2...Lower body,
26...Joint surface, 3...Seat ring, 31...
Valve stem hole, 32... Annular groove, 33... Cylindrical portion, 34
...Outer edge, 4... Valve stem, 5... Valve body, 6... Annular adapter with flange, 61... Annular groove, 64... Flange,
65... Cylindrical part.

Claims

[Scope of utility model registration request]

An upper and lower main body that is divided into two in the horizontal direction of the piping, an elastic seat ring that is fitted into the main body and wraps around the inner circumferential surface and side circumferential surface of the main body, and an upper and lower main body that is rotatably arranged within the seat ring. In a butterfly valve consisting of a valve body supported by a valve stem passing through each valve stem through hole of the main body and a valve stem through hole of a seat ring, and a flanged annular adapter that abuts both ends of the seat ring, the upper part Annular protrusions concentric with the valve stem through hole are provided on the inner circumferential surface of the lower body, respectively, in the vicinity of the valve stem through hole, and side surfaces that enclose the flanged annular adapter that abuts on both sides are perpendicular to the inner circumferential surface. An annular groove is provided in the seat ring, the annular groove having a flat surface and a vertical or inclined surface facing the opposite surface, and an annular groove concentric with the valve stem through hole that engages with the annular protrusion provided on the inner circumferential surfaces of the upper and lower main bodies. A groove is provided on the outer circumferential surface of the cylindrical portion, and outer edges with a rectangular cross section that partially protrude outward are provided on both edges of the cylindrical portion, and the inner surfaces of the outer edges are provided on the side circumferential surfaces of the upper and lower bodies, respectively. The flanged annular adapter has a flange having a vertical plane formed with a groove to engage with the outer edge of the seat ring at one end and a vertical plane or an inclined plane on the back surface thereof, and a piping at the other end. A butterfly valve comprising: a cylindrical portion having an engaging portion with the cylindrical portion;