JPH0462969U

JPH0462969U -

Info

Publication number: JPH0462969U
Application number: JP10524990U
Authority: JP
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1992-05-28
Anticipated expiration: 2005-10-08
Also published as: JP2527041Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例についての断面図、
第２図はボール弁の流出側開口の断面図、第３図
ａはボール弁と弁シート部分の断面図、第３図ｂ
はボール弁と弁シートの関係を示す説明図、第４
図ａ，ｂ，ｃ，ｄは、ボール弁の開弁過程を流入
側から見た正面図、第５図ａ，ｂ，ｃ，ｄは、ボ
ール弁の開弁過程を流出側からみた正面図、第６
図ａ，ｂ，ｃ，ｄは、第４図の開弁過程に対して
第５図の開弁過程を複合した状態を流入側から見
た正面図、第７図ａ，ｂは従来のボール弁を示し
、ａは正面図、ｂは断面図である。６……弁シート、７……ボール弁体、９……流
過孔、Ｃ……円形開口、Ｂ……扇形開口、Ｂ′…
…開弁初期微小流量確保用切欠。 FIG. 1 is a sectional view of an embodiment of the present invention.
Figure 2 is a sectional view of the outflow side opening of the ball valve, Figure 3a is a sectional view of the ball valve and valve seat, and Figure 3b
4 is an explanatory diagram showing the relationship between the ball valve and the valve seat.
Figures a, b, c, and d are front views of the ball valve opening process seen from the inflow side. Figures 5 a, b, c, and d are front views of the ball valve opening process seen from the outflow side. , 6th
Figures a, b, c, and d are front views from the inflow side of a state where the valve opening process in Figure 5 is combined with the valve opening process in Figure 4, and Figures 7 a and b are the conventional ball opening process. The valve is shown, with a being a front view and b being a sectional view. 6... Valve seat, 7... Ball valve body, 9... Flow hole, C... Circular opening, B... Fan-shaped opening, B'...
...Notch to ensure a small flow rate at the initial stage of valve opening.

Claims

[Scope of utility model registration request]

forming a circular opening on the primary side and a fan-shaped opening on the secondary side located on both sides of the flow hole in the ball valve body, and forming a conduction hole communicating with the flow hole between the circular opening and the fan-shaped opening; The diameter of the circular opening φD < the inner diameter of the valve seat φD' and the diameter of the circular opening φD = the long side diameter of the fan-shaped opening φd', and a notch with length α is provided at the base end of the fan-shaped opening to ensure a minute flow rate at the initial stage of valve opening. φ
A proportional ball valve characterized in that d'+α<φD', and in the initial stage of valve opening, the through hole is located at the primary port and communicates with a notch for ensuring a minute flow rate at the initial stage of valve opening located at the secondary port.