JPS643160U

JPS643160U -

Info

Publication number: JPS643160U
Application number: JP9736787U
Authority: JP
Priority date: 1987-06-26
Filing date: 1987-06-26
Publication date: 1989-01-10
Also published as: JPH0429164Y2

Description

[Brief explanation of the drawing]

第１図乃至第５図は本考案におけるバタフライ
バルブの実施例を示したもので、第１図は本考案
におけるバタフライバルブの一例を示した半截断
面斜視図、第２図は同上のジスクの斜視図、第３
図は同上のシートリングとジスクの圧接状態を説
明するための平面説明図、第４図イは本考案にお
けるバタフライバルブの他例を示す部分断面図、
第４図ロは同上のジスクの側面図、第５図はジス
クの部分説明図であり、第６図は従来のバタフラ
イバルブの半截断面斜視図、第７図は従来のジス
クの斜視図、第８図乃至第１０図は本考案を説明
するために示した従来のシートリングとジスクの
平面説明図である。１……ボデー、２，１２……シートリング、３
ａ，３ｂ，１３ａ，１３ｂ……ステム、４，１４
……ジスク、４ａ，１４ａ……シール面、４ｂ…
…ボス部。 Figures 1 to 5 show examples of the butterfly valve according to the present invention. Figure 1 is a half-cut perspective view showing an example of the butterfly valve according to the present invention, and Figure 2 is a perspective view of the same disk. Figure, 3rd
The figure is an explanatory plan view for explaining the press-contact state of the seat ring and the disc, and FIG. 4A is a partial sectional view showing another example of the butterfly valve according to the present invention.
Fig. 4B is a side view of the same disc as above, Fig. 5 is a partial explanatory view of the disc, Fig. 6 is a half-cut perspective view of a conventional butterfly valve, and Fig. 7 is a perspective view of a conventional disc; FIGS. 8 to 10 are explanatory plan views of a conventional seat ring and disc shown for explaining the present invention. 1...Body, 2, 12...Seat ring, 3
a, 3b, 13a, 13b... stem, 4, 14
...Disc, 4a, 14a...Seal surface, 4b...
...Boss department.

Claims

[Scope of Claim for Utility Model Registration] (1) A seat ring made of an elastic material is attached to the inner circumferential surface of a cylindrical body, and the outer circumferential surface of a disk rotatably provided on the inner circumferential surface of this seat ring. The butterfly valve has a structure in which it is closed by being brought into pressure contact with a seat ring, and a pair of through holes are formed at diametrically opposed positions on the inner peripheral surface of the seat ring, and a boss contact surface is formed around the through holes. A boss part is formed at a position opposite the disc so that the boss part is always in pressure contact with the contact surface of the boss part, and the width of the sealing surface on the outer circumferential surface of the disc is formed to gradually become wider as the distance from the boss part increases. Butterfly valve. (2) The butterfly valve according to claim 1, wherein the outer circumferential surface of the disc and the pressure contact surface of the seat ring are the same spherical surface. (3) Utility model registration claim No. 1 in which the outer peripheral surface of the disk and the pressure contact surface of the seat ring are formed into spherical surfaces.
Butterfly valve as described in section.