JPS6348065U

JPS6348065U -

Info

Publication number: JPS6348065U
Application number: JP14058886U
Authority: JP
Priority date: 1986-09-16
Filing date: 1986-09-16
Publication date: 1988-04-01
Also published as: JPH0241397Y2

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
のシーリング機構の断面図、第２図及び第３図は
作用状態を示す要部断面図、第４図は比較例を示
す要部説明図、第５図は従来のバタフライ弁の要
部断面図、第６図及び第７図は同作用説明図であ
る。３…本体、５…弁体、１１…ガスケツトパツキ
ン、１２…シートリング、１２ａ…シーリング部
、１２ｂ…平板部、１４…シート押え金物、１４
ａ…板ばね装着溝、１４ｂ…内径縁部、１５…板
ばね。 Fig. 1 is a sectional view of a sealing mechanism of a butterfly valve showing an embodiment of the present invention, Figs. 2 and 3 are sectional views of main parts showing the operating state, and Fig. 4 is an explanatory view of main parts showing a comparative example. , FIG. 5 is a sectional view of a main part of a conventional butterfly valve, and FIGS. 6 and 7 are explanatory views of the same operation. 3... Main body, 5... Valve body, 11... Gasket packing, 12... Seat ring, 12a... Sealing part, 12b... Flat plate part, 14... Seat presser, 14
a... Leaf spring mounting groove, 14b... Inner diameter edge, 15... Leaf spring.

Claims

[Claims for Utility Model Registration] 1. An annular seat ring in which the sealing portion that contacts the valve body is formed in an arc shape and has a flat plate portion in the radial direction in a butterfly valve that separately has a seat clamp and a seat ring. is placed between the main body and the sheet presser, and a sealing member such as a gasket packing is placed on the flat plate of the seat ring so that it comes into contact with the wall of the main body together with the flat plate of the seat ring. A plate spring mounting groove whose inner diameter is set larger than the center diameter of the sealing arc of the seat ring is provided at a position facing the wall surface, and a plate spring fitting groove is provided in the plate spring mounting groove so as to be able to freely displace in the direction of the main body wall surface so as to abut against the sealing part. One or more annular leaf springs that contact and press the seat ring toward the valve body are arranged so as to surround the sealing part,
A butterfly valve sealing mechanism characterized by having peripheral support beam characteristics. 2. The sealing mechanism for a butterfly valve according to claim 1, wherein the leaf spring mounting groove has a stepped portion facing the wall surface of the main body. 3. The butterfly valve sealing mechanism according to claim 1, wherein the sealing portion of the annular seat ring includes a coil spring or a core having a circular cross section.