JPS6175561U

JPS6175561U -

Info

Publication number: JPS6175561U
Application number: JP16147484U
Authority: JP
Priority date: 1984-10-25
Filing date: 1984-10-25
Publication date: 1986-05-21
Also published as: JPH0117749Y2

Description

[Brief explanation of drawings]

第１図は本考案に係る流量制御弁の一実施例を
示す縦断面図、第２図は同流量制御弁の要部を示
す作動前の状態の縦断面図、第３図は第２図のＸ
方向矢視図、第４図は同流量制御弁の要部を示す
作動時の状態の縦断面図、第５図は同流量制御弁
の要部を示す第４図と異なつた作動時の状態の縦
断面図、第６図は同流量制御弁の要部を示す閉鎖
状態の縦断面図、第７図は同流量制御弁の動作を
示すグラフ、第８図は従来の流量制御弁を示す縦
断面図、第９図は同流量制御弁の要部を示す作動
状態の縦断面図、第１０図は同流量制御弁の作動
を示すグラフ、第１１図は従来の他の流量制御弁
を示す縦断面図、第１２図は同流量制御弁の要部
を示す作動状態の縦断面図、第１３図は同流量制
御弁の動作を示すグラフである。符号の説明、２…弁箱、９…弁体、１０…弁頭
、１０ａ…弁座当接面、１０ｂ…反弁座当接面、
１０ｃ…外周側面、１１…弁座、２４…ダイアフ
ラム室、２７…ラビリンス室、２８…弾性体、３
１…フイン、３２…切欠部、ｇ…微小間隙。 FIG. 1 is a vertical cross-sectional view showing an embodiment of the flow control valve according to the present invention, FIG. 2 is a vertical cross-sectional view showing the main parts of the flow control valve in a state before operation, and FIG. X of
4 is a vertical sectional view of the main parts of the flow control valve in an operating state, and Fig. 5 is a different operating state from Fig. 4 showing the main parts of the flow control valve. 6 is a vertical sectional view showing the main parts of the flow control valve in a closed state, FIG. 7 is a graph showing the operation of the flow control valve, and FIG. 8 is a conventional flow control valve. 9 is a vertical sectional view showing the main parts of the same flow control valve in an operating state, FIG. 10 is a graph showing the operation of the same flow control valve, and FIG. 11 is a graph showing another conventional flow control valve. FIG. 12 is a vertical cross-sectional view showing essential parts of the flow control valve in an operating state, and FIG. 13 is a graph showing the operation of the flow control valve. Explanation of symbols, 2... Valve box, 9... Valve body, 10... Valve head, 10a... Valve seat abutting surface, 10b... Anti-valve seat abutting surface,
10c...Outer peripheral side surface, 11...Valve seat, 24...Diaphragm chamber, 27...Labyrinth chamber, 28...Elastic body, 3
1...Fin, 32...Notch, g...Minute gap.

Claims

[Scope of utility model registration request]

a valve seat provided in a valve box; a valve body disposed upstream of the valve seat and provided with a valve head that opens and closes the valve in cooperation with the valve seat by working fluid supplied to a diaphragm chamber; A flow control valve comprising: a labyrinth chamber that sealingly covers a contact surface of the valve head opposite to the valve seat and is supported on the valve box side facing the outer circumferential side surface of the valve head with a small gap therebetween; , the valve seat contacting surface of the valve head is formed into a conical shape, the valve seat is formed of an elastic body, and a part of the elastic body constituting the valve seat is made to protrude inward to provide an annular fin. , A flow control valve characterized in that the fin is provided with a notch.