JPH0165985U

JPH0165985U -

Info

Publication number: JPH0165985U
Application number: JP1987160966U
Authority: JP
Priority date: 1987-10-21
Filing date: 1987-10-21
Publication date: 1989-04-27

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
弁座の山形の厚肉部分の例を示す斜視図、第５図
および第６図は弁体の貫通孔の例を示す断面図、
第７図は本考案の仕切弁のＣ_ｖ値比と開度比の関
係を示す図、第８図は本考案の他の実施例を示す
仕切弁の縦断面図である。 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 the chevron-shaped thick part of the valve seat, and FIGS. 5 and 6 are cross-sectional views showing examples of the through hole of the valve body.
FIG. 7 is a diagram showing the relationship between the _Cv value ratio and the opening ratio of the gate valve of the present invention, and FIG. 8 is a longitudinal sectional view of the gate valve showing another embodiment of the present invention.

Claims

[Scope of utility model registration request]

The gate valve is composed of two parallel and opposing planar valve seats provided around the flow path of the main body, and a planar valve body that slides between the valve seats, and a through hole in the valve seat. This system creates a fully open state in which the through hole of the valve body matches, and a fully closed state in which the through hole in the valve seat is blocked by the valve body. A portion where the valve begins to open upon sliding engagement with the main body is created near the center of the flow path of the main body, and the shape of the through hole of the valve body at the opening portion is approximately triangular so that the flow rate gradually increases. A gate valve characterized by: