JPS6369862U

JPS6369862U -

Info

Publication number: JPS6369862U
Application number: JP16627586U
Authority: JP
Priority date: 1986-10-28
Filing date: 1986-10-28
Publication date: 1988-05-11
Also published as: JPH0425563Y2

Description

[Brief explanation of the drawing]

第１図は従来例のボールバルブの断面図である
。第２図は従来例の入口側弁座部の拡大図である
。第３図は本考案のボールバルブの断面図である
。第４図は本考案の実施例における入口側弁座部
の拡大図である。第５図は本考案の他の実施例に
おける入口側弁座部の拡大図である。１：本体、３：端部材、４：入口、５：出口、
６：弁室、７：弁ボール、８：貫通孔、１１・１
２：環状弁座、１５・１６：皿バネ、１７・１８
：環状バネ、２０：弁軸、２８：ハンドル、３２
・３３：断面Ｕ字状環状バネ。 FIG. 1 is a sectional view of a conventional ball valve. FIG. 2 is an enlarged view of the inlet side valve seat of a conventional example. FIG. 3 is a sectional view of the ball valve of the present invention. FIG. 4 is an enlarged view of the inlet side valve seat in the embodiment of the present invention. FIG. 5 is an enlarged view of the inlet side valve seat in another embodiment of the present invention. 1: Main body, 3: End member, 4: Inlet, 5: Outlet,
6: Valve chamber, 7: Valve ball, 8: Through hole, 11.1
2: Annular valve seat, 15/16: Belleville spring, 17/18
: Annular spring, 20: Valve stem, 28: Handle, 32
・33: Annular spring with U-shaped cross section.

Claims

[Scope of utility model registration request]

A valve ball having a through hole is placed in a valve casing that forms a fluid passage, and a valve shaft that passes through the valve casing in an airtight manner rotates the valve ball, making contact with the valve ball to open and close the fluid passage. An annular valve seat made of synthetic resin or synthetic rubber that works together with the valve ball is placed in the fluid passage, a recess is formed within the annular valve seat, and an elastic member such as a spring is placed in the recess within the annular valve seat. A ball valve in which the elastic modulus of an elastic member such as a spring is increased toward the center of the annular valve seat and decreased toward the outer circumference of the annular valve seat.