JPH0413874U

JPH0413874U -

Info

Publication number: JPH0413874U
Application number: JP5503490U
Authority: JP
Priority date: 1990-05-25
Filing date: 1990-05-25
Publication date: 1992-02-04

Description

[Brief explanation of the drawing]

第１図、第２図は本考案の一実施例を示すもの
で、第１図は要部の半側断面図、第２図は弁全体
の一部破断側面図、第３図は従来の玉形弁の側断
面図である。１……弁箱、５……弁棒、８……弁座、９……
上流通口、２０……第１弁体、２１……嵌合部、
２４……第２弁体、２５……ピストン、２６……
羽根部、２８……シール面、２９……スプリング
、３１……内圧弁室、３２……連通孔。 Figures 1 and 2 show one embodiment of the present invention. Figure 1 is a half-sectional view of the main part, Figure 2 is a partially cutaway side view of the entire valve, and Figure 3 is a conventional valve. FIG. 2 is a side sectional view of the globe valve. 1... Valve box, 5... Valve stem, 8... Valve seat, 9...
Upper flow port, 20...first valve body, 21...fitting part,
24...Second valve body, 25...Piston, 26...
Vane portion, 28... Seal surface, 29... Spring, 31... Internal pressure valve chamber, 32... Communication hole.

Claims

[Scope of utility model registration request]

The first valve body, which is attached to the tip of the valve stem that is driven in the axial direction and faces a flow port formed in the valve body, has a valve seat formed around the outlet of the flow port. A cylindrical fitting part having an enlarged inner diameter is formed, and the first valve body is tightly fitted into the fitting part so as to be slidable in the axial direction at the front of the first valve body.
A second valve body is installed, which has a piston that is coupled to the valve body and has a sealing surface that moves toward and away from the valve seat, and a vane that is slidably fitted into the flow port. The valve body is biased in the closing direction by a spring, and the second valve body communicates with an internal pressure valve chamber formed in the first valve body and sealed by the piston and an inlet portion of the communication port. A valve closing mechanism characterized by having a communication hole extending through the valve.