JPS61141872U

JPS61141872U -

Info

Publication number: JPS61141872U
Application number: JP2567685U
Authority: JP
Priority date: 1985-02-25
Filing date: 1985-02-25
Publication date: 1986-09-02

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示した側断面図、
第２図は本考案における弁座体の拡大側断面図、
第３図は逆流水圧力の弱い場合における状態を示
す要部拡大側断面図、第４図は同強い場合におけ
る状態を示す要部拡大側断面図、第５図は従来の
逆止弁を示す側断面図である。１…弁筐、２…弁室、３…接続管、４…結合部
、５…接続管部、９…ボール弁、１０…弁座体、
１１…座板、１２…膨出部、１３…凹環部、１４
…弁座部、１５…肉厚部、１６…尖鋭部、ａ…緩
い傾斜面、ｂ…急な傾斜面。 FIG. 1 is a side sectional view showing an embodiment of the present invention;
Figure 2 is an enlarged side sectional view of the valve seat body in the present invention;
Fig. 3 is an enlarged side sectional view of the main part showing the state when the backflow water pressure is weak, Fig. 4 is an enlarged side sectional view of the main part showing the state when the backflow water pressure is strong, and Fig. 5 shows a conventional check valve. FIG. DESCRIPTION OF SYMBOLS 1...Valve housing, 2...Valve chamber, 3...Connecting pipe, 4...Joining part, 5...Connecting pipe part, 9...Ball valve, 10...Valve seat body,
DESCRIPTION OF SYMBOLS 11...Seat plate, 12...Bulging part, 13...Concave ring part, 14
...Valve seat part, 15... Thick part, 16... Sharp part, a... Gentle slope, b... Steep slope.

Claims

[Scope of utility model registration request]

A non-return check consisting of a cylindrical valve housing 1 which has a connecting part 4 with an inlet side connecting pipe 3 at the upper end, a connecting pipe part 5 with an outlet pipe 6 at the lower end, and houses a ball valve so as to be able to freely move up and down. In the valve, on the lower surface of an annular seat plate 11 having a bulging portion 12 on the outer periphery of the upper surface and a concave ring portion 13 on the inner side thereof, a thick wall portion 1 having an inner periphery formed with a gentle slope a is provided.
5 and a pointed portion 16 having a chevron-shaped cross section and whose inner periphery is formed into a steeply sloped surface b. The portion 14 is fitted into the upper end portion of the valve housing 1, and the valve seat body 10
A check valve characterized in that it is connected to a joint pipe 3 through a seat plate 11.