JPS6357866U

JPS6357866U -

Info

Publication number: JPS6357866U
Application number: JP14949986U
Authority: JP
Priority date: 1986-10-01
Filing date: 1986-10-01
Publication date: 1988-04-18

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す仕切弁の縦断
面図、第２図は第１図の弁体および弁座を示す拡
大断面図、第３図は第２図の縦断面図、第４図は
山形の厚肉部分の例を示す斜視図、第５図は本考
案の第２の実施例を示す仕切弁の要部縦断面図、
第６図および第７図は弁体の貫通孔の例を示す断
面図、第８図は本考案の仕切弁の開度比とＣｖ値
の関係を示す図、第９図は本考案の第３の実施例
を示す仕切弁の縦断面図、第１０図は従来例を示
す仕切弁の縦断面図、第１１図は第１０図に示す
弁体および弁座が中間開度で使用されている状態
を示す断面図である。１：本体、２：弁座、３：弁体、１１：上流路
、１２：下流路、１３：胴部、２１：弁座の座面
、２２：弁座の貫通孔、２３：弁体の厚肉部分、
３１：弁体の座面、３２：弁体の貫通孔。 FIG. 1 is a longitudinal sectional view of a gate valve showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view showing the valve body and valve seat of FIG. 1, and FIG. 3 is a longitudinal sectional view of FIG. 2. FIG. 4 is a perspective view showing an example of a chevron-shaped thick walled portion, and FIG. 5 is a vertical cross-sectional view of a main part of a gate valve showing a second embodiment of the present invention.
FIGS. 6 and 7 are cross-sectional views showing examples of through holes in valve bodies, FIG. 8 is a view showing the relationship between the opening ratio and Cv value of the gate valve of the present invention, and FIG. 9 is a cross-sectional view showing an example of the through hole of the valve body. Fig. 10 is a longitudinal cross-sectional view of a gate valve showing a conventional example, and Fig. 11 shows a case in which the valve body and valve seat shown in Fig. 10 are used at an intermediate opening degree. FIG. 1: Main body, 2: Valve seat, 3: Valve body, 11: Upstream passage, 12: Downstream passage, 13: Body, 21: Seat surface of valve seat, 22: Through hole of valve seat, 23: Valve body thick part,
31: Seating surface of the valve body, 32: Through hole of the valve body.

Claims

[Scope of utility model registration request]

A plate-shaped plate having two parallel and opposing plane valve seats provided around the flow path of the main body, a parallel surface that slides onto the plane valve seats, and a through hole corresponding to the flow path of the main body. from a fully open state in which the through hole of the valve disc and the flow path in the main body completely overlap to a fully closed state in which the through hole in the valve disc is completely blocked from the flow path in the main body. For the movement of the valve body up to
In the gate valve in which the plane valve seat is formed so as to always surround and make sealing contact with the through hole of the valve body, the through hole of the valve body and the valve seat is shaped such that at most the lower half or the upper half thereof is filled. Features a gate valve.